Text Structure and Purpose

SAT Reading and Writing· difficulty 2/5

Octopuses are remarkably intelligent for invertebrates. They can solve puzzles, open jars, and even recognize individual human caretakers. Studies have also documented octopuses using coconut shells as portable shelters — a behavior considered a form of tool use.

Which choice best describes the function of the third sentence in the text?

  • A

    It provides additional support for the opening claim about octopus intelligence.

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  • B

    It introduces a different species of cephalopod.

  • C

    It contradicts the claim that octopuses are intelligent.

  • D

    It defines the term 'invertebrate'.

Explanation

Tool use further demonstrates intelligence. B identifies the supporting function.

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