Text Structure & Purpose

Sea otters were hunted nearly to extinction along the North Pacific coast in the nineteenth century, and the kelp forests there thinned dramatically in the decades that followed. Ecologists long attributed the loss of kelp to warming coastal waters. But otters eat sea urchins, and urchins eat kelp; where otter populations have since recovered, urchin numbers have fallen and kelp has returned, in some places even where water temperatures have continued to rise. The kelp forests were not, then, primarily a casualty of temperature. They were a casualty of a missing predator.

Which choice best states the main purpose of the text?

• ATo explain why sea otter populations along the North Pacific coast collapsed in the nineteenth century.

  A student picking this can point to the first clause, which does name hunting as the cause — so it feels textually supported. But that clause is the setup: the text turns at "But," and everything the author is actually doing happens after the turn. This describes the throat-clearing, not the purpose.

• BTo argue that rising water temperatures have no effect on kelp forests.

  This is the right direction with an inflated verb and an inflated claim. The text says the forests were not PRIMARILY a casualty of temperature and that kelp returned in SOME places despite warming — two hedges, both of which this choice deletes. "No effect" is a stronger statement than the passage anywhere makes.

• To present evidence that a common explanation for an ecological change was mistaken, and to identify a better one.

  Correct, and check both halves separately, since it is a compound choice. "Evidence that a common explanation was mistaken": the text names the temperature explanation as long-held, then gives recovery data showing kelp returning even where waters kept warming. "Identify a better one": the closing sentence supplies it — a missing predator. Both conjuncts hold.

• DTo describe the feeding relationships that connect otters, urchins, and kelp.

  Accurate — the text does describe that chain. But the chain is the evidence the author uses, not the thing the author is doing with it. This choice could have been written by someone who read only the middle sentence, which is the standard test for a content echo.

Traps tested: Pre pivot purpose · Scope inflation · Content echo

Beginning in the 1970s, art historians working through nineteenth-century French exhibition catalogues found that women painters appeared in them far more often than the standard survey histories suggested. The point was not that these painters had been forgotten by accident. Museums acquire what dealers offer, dealers offer what collectors want, and collectors have generally wanted what museums display — a circuit that, once a painter is outside it, is hard to re-enter. The absence of women from the surveys was therefore not a neutral record of who had painted well; it was a record of what the market had kept in circulation.

Which choice best describes the function of the sentence "Museums acquire what dealers offer, dealers offer what collectors want, and collectors have generally wanted what museums display — a circuit that, once a painter is outside it, is hard to re-enter." in the text as a whole?

• AIt raises an objection to the historians' interpretation that the final sentence goes on to answer.

  This assigns the sentence a stance it never takes. Nothing in it opposes the historians; it extends their point. And the final sentence draws a conclusion rather than rebutting anything, so the move this choice depends on does not occur.

• BIt describes the ordinary process by which museums and dealers build their collections.

  The most-chosen wrong answer, and an accurate paraphrase — which is exactly the problem. Apply the test: this choice could have been written by someone who read this sentence and nothing else. It names the sentence's content and says nothing about the job it does for the argument.

• CIt presents the archival findings on which the historians based their conclusion.

  A student picking this has correctly noticed that the text contains archival findings and that "presents evidence" is a real function — but the findings are in the first sentence (the exhibition catalogues). This sentence offers no data at all; it offers an explanatory model. The job named here belongs to a different sentence.

• It supplies the mechanism that accounts for an exclusion the text has just refused to call accidental.

  Correct. The preceding sentence rules out accident without saying what the alternative is; this sentence supplies it — a self-reinforcing loop that keeps out whoever is already out. The final sentence then draws the conclusion that loop licenses. Function named by relationship, in both directions.

Traps tested: Attributed stance · Content echo · Order swap

A recent review of river-restoration projects reports that most are evaluated within three years of completion, and that projects judged successful at that point are frequently judged unsuccessful when revisited after a decade. The review's authors treat this as an argument for longer monitoring windows. They do not argue that the projects fail; they argue that three years is too short a period in which to know. Funding agencies, however, tend to set evaluation deadlines to match grant cycles rather than ecological ones, and the review does not address how that constraint might be changed.

Which choice best describes the function of the sentence "They do not argue that the projects fail; they argue that three years is too short a period in which to know." in the text as a whole?

• AIt concedes that the projects under review were unsuccessful before proposing a remedy.

  This reads a qualification as an admission of failure. The sentence does the opposite of conceding failure — its first clause explicitly denies that claim. A student picking this has absorbed "judged unsuccessful" from the opening sentence and carried it into a sentence written to block precisely that inference.

• It forestalls a misreading of the finding just reported, confining the authors' claim to what three years of data can establish.

  Correct. Ask what the sentence is for: the finding in sentence one invites the inference "restoration does not work," and this sentence exists to block it and to state the narrower claim the authors are actually making. That is a job — preventing an inference — and it is visible only from the sentence's relationship to the one before it.

• CIt identifies a limitation of the review that the final sentence then specifies.

  The text does identify a limitation of the review — but in the final clause ("the review does not address how that constraint might be changed"), not here. This sentence limits the review's CLAIM, not the review. The move is real and located one sentence away, which is what makes this choice worth taking seriously and still wrong.

• DIt states the author's own disagreement with the review's conclusion.

  The sentence reports what the review's authors argue — "they argue" — and the text's author registers no disagreement anywhere. This is the attribution error: handing a reported view to the author, or inventing a stance for an author who is only relaying one.

Traps tested: Qualify read as refute · Order swap · Attributed stance

The standard account of the Moon's origin holds that a Mars-sized body struck the early Earth and that the Moon condensed out of the resulting debris. The account explains the Moon's unusually small iron core well. It also predicts that lunar material should be isotopically distinguishable from Earth's, since the impactor would have formed elsewhere in the solar system. It is not: in oxygen, titanium, and tungsten, the Apollo samples match Earth's mantle to within measurement error. Some researchers have since proposed a far more energetic collision, one that vaporised and thoroughly mixed both bodies. Whether an impact of that kind is dynamically plausible is not yet settled.

Which choice best describes the overall structure of the text?

• AIt presents two competing accounts of the Moon's origin, weighs the evidence for each, and endorses the better supported one.

  The text does contain two accounts, so the first clause survives a quick glance — but the choice is compound and the rest fails. The evidence is weighed against the first account only; the second is introduced and immediately left open. And the closing sentence withholds endorsement explicitly, which is the opposite of the move this choice ends on.

• It introduces a scientific account, notes both a prediction the account gets right and one it gets wrong, describes a proposed revision, and states that the revision is not yet established.

  Correct, and it is worth checking all four conjuncts against the text in order, since a compound structure choice fails if any one of them does. Account introduced (sentence 1). Successful prediction (small iron core). Failed prediction (isotopic distinctness predicted, not observed). Revision proposed (higher-energy collision). Revision unsettled (final sentence). Four moves, right order.

• CIt reports an anomalous measurement, reviews the history of attempts to explain it, and concludes that the anomaly has been resolved.

  Every element here appears somewhere in the text, but the sequence is wrong at both ends: the anomalous measurement arrives fourth, not first, and the text closes on "not yet settled" rather than on a resolution. Structure questions are decided by order, and a choice can name only real moves and still be wrong about all of them.

• DIt criticises a long-standing account, explains why researchers have been reluctant to abandon it, and offers the author's own alternative.

  Three separate failures, each of a kind worth recognising. "Criticises" assigns an attitude to a text that reports a failed prediction neutrally — reporting that a model mispredicts is not criticism. Researcher reluctance is never mentioned. And the alternative is attributed in the text to "some researchers," not to the author.

Traps tested: Invented resolution · Order swap · Attributed stance

Every morning for eleven years Adaeze had unlocked the shop at six and set the kettle on before the lights. She knew which floorboard complained, which drawer stuck in August, the exact weight of the door in a crosswind. When the letter came saying the building had been sold, she read it twice, folded it into quarters, and put it in the drawer that stuck. Then she filled the kettle. At a quarter past six a customer asked whether she had heard anything about the sale, and she said that she had not.

Which choice best states the main purpose of the text?

• ATo describe the morning routine of a shopkeeper who has run the same shop for many years.

  The strongest distractor here, and the one that costs the most points on literary passages. It is accurate, and it accounts for the first half of the excerpt exactly — then stops at the pivot. The letter arrives, and everything after it (the folding, the drawer, the denial) is unaccounted for. A purpose has to cover the whole text, including the turn.

• BTo explain the financial circumstances that led to the sale of the building.

  The text supplies no financial circumstances at all — the sale arrives as a letter and is never explained. This is a purpose the passage could not serve with the information it contains, which is the fastest kind of choice to eliminate once you check it against the text rather than against what a story like this usually does.

• CTo trace the gradual decline of a small business over more than a decade.

  Eleven years of unbroken routine is not decline, and the passage describes no falling trade, no loss, no dwindling. A student picking this has imported the arc that "eleven years" and "the building had been sold" usually belong to, and answered about that arc rather than about the words on the page.

• To depict a character's intimate familiarity with a place and to show her withholding news that threatens it.

  Correct, and both halves are separately supported. The familiarity is built out of specifics only long habit produces — which board complains, which drawer sticks, the door's weight in a crosswind. The withholding is the closing line, made pointed by the fact that she has just filed the letter in the very drawer she knows sticks. The purpose of a narrative excerpt is what the portrayal establishes, not the events themselves.

Traps tested: Pre pivot purpose · Off topic attribute · Imported narrative arc

A frequently cited study reported that shoppers bought more fresh produce when a supermarket played slower background music, and the result was absorbed quickly into popular writing about ambient influence on behaviour. A later analysis raised a structural objection: in the stores studied, the slower playlists ran mainly on weekday mornings, when the customers present skewed older and were shopping for groceries rather than browsing. Once time of day is modelled, much of the original difference shrinks. The study's authors have granted the scheduling point while maintaining that a residual effect survives it. What is genuinely in dispute, then, is not whether tempo matters at all, but how much of the difference is left once the artefact is removed.

Which choice best describes the function of the sentence "The study's authors have granted the scheduling point while maintaining that a residual effect survives it." in the text as a whole?

• It records a concession by the original researchers that narrows their claim without abandoning it, setting up the text's account of what is still contested.

  Correct on both conjuncts. "Granted the scheduling point" is the concession; "maintaining that a residual effect survives" is the narrowing that keeps the claim alive. And the sentence is load-bearing for the one that follows: the final sentence can only say the dispute is over HOW MUCH remains because this sentence established that the authors still claim something remains.

• BIt reports that the original researchers have withdrawn their finding in response to the objection.

  This collapses a qualification into a refutation, which is the discrimination the item is built on. Granting one point while maintaining another is not withdrawal — the second clause explicitly keeps a residual effect on the table, and the final sentence confirms the claim is still live by saying the dispute is about its size.

• CIt introduces the structural objection that the later analysis raised about time of day.

  The objection is genuinely in the text, which is what makes this choice tempting — but it is introduced two sentences earlier. This sentence responds to the objection; it does not introduce it. Checking which sentence carries which move is a ten-second operation and it decides this item.

• DIt supplies the measurement showing how much of the original difference remains.

  "Supplies the evidence" is the most frequently credited function verb on this test, which is exactly why it is planted here. No measurement appears in this sentence or anywhere else in the text — and the closing sentence states outright that how much remains is the unresolved question, so no such figure could be in the passage.

Traps tested: Qualify read as refute · Order swap · Evidence vs claim conflation