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Craft and StructureEasy–MediumText structure and purpose: function of an underlined phrase

Craft and Structure practice question

When ecologist Ana Ruiz-Mora visits elementary schools to talk about mangrove forests, she rarely opens with the figures that fill her published papers—tons of carbon stored per hectare, counts of species per square meter. Instead, she points to a photograph of the trees' arching, tangled roots and calls the space beneath them a nursery with a thousand doorways, a sheltered room that young fish drift into on the tide and leave only when they are large enough to survive in open water. Once her listeners can picture that crowded, protected space, she brings out the numbers.

Which choice best describes the function of the phrase "a nursery with a thousand doorways" in the text as a whole?

  1. A. It offers a vivid image that helps Ruiz-Mora's young listeners understand a mangrove forest's role before she introduces statistics.Correct
  2. B. It supplies the technical definition of "mangrove" that Ruiz-Mora expects students to memorize.
  3. C. It indicates that Ruiz-Mora considers the figures in her published papers unreliable.
  4. D. It presents a common misconception about mangroves that Ruiz-Mora goes on to correct.

Answer: A. It offers a vivid image that helps Ruiz-Mora's young listeners understand a mangrove forest's role before she introduces statistics.

The phrase is a figurative image Ruiz-Mora uses with schoolchildren; the text explicitly says that only "once her listeners can picture that crowded, protected space" does she present the numbers, so the image prepares her audience for the data. (B) mistakes a metaphor for a definition—"a nursery with a thousand doorways" is not technical language, and nothing suggests memorization. (C) overreads her sequencing as distrust: she delays the statistics, but she still uses them and publishes them. (D) misidentifies whose idea it is: the phrase is Ruiz-Mora's own teaching image, not an error attributed to others that she then refutes.

Why the other answers are wrong

B. It supplies the technical definition of "mangrove" that Ruiz-Mora expects students to memorize.
"A nursery with a thousand doorways" is a metaphor, not technical language, and nothing in the text suggests students are expected to memorize a definition.
C. It indicates that Ruiz-Mora considers the figures in her published papers unreliable.
Delaying the numbers isn't distrusting them—she still brings the figures out and publishes them in her papers.
D. It presents a common misconception about mangroves that Ruiz-Mora goes on to correct.
The phrase is Ruiz-Mora's own teaching image, not a mistaken belief held by others that she then corrects.

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