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Craft and StructureVery hardPurpose of an analogy

Craft and Structure practice question

A city's water system is like its circulation: most of it is invisible, nobody thinks about it while it works, and a single blocked artery can bring the whole body to a halt.

Which choice best states the main purpose of the text?

  1. A. To make the importance of an unnoticed system vivid by comparing it with the body.Correct
  2. B. To explain how blood circulates.
  3. C. To describe a water shortage.
  4. D. To argue for building more pipes.

Answer: A. To make the importance of an unnoticed system vivid by comparing it with the body.

The body stands in for the pipes.

Why the other answers are wrong

B. To explain how blood circulates.
The body is the comparison, not the subject.
C. To describe a water shortage.
No shortage.
D. To argue for building more pipes.
No proposal.

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