10

Set 2: Words in Context

Explanation

Answer: A

PASSAGE

Unlike mammals that maintain a constant body temperature, reptiles are cold-blooded and rely on external heat sources to ______ their body heat.

Which choice completes the text with the most logical and precise word or phrase?

A. regulate✓ Correct
B. dissipate
C. ignore
D. freeze

Detailed Explanation

Animals need to control or adjust their body temperature. 'Regulate' means to control or maintain the rate or speed of a machine or process.

Key Evidence:

• "maintain ... temperature"

• "rely on external heat"

Why others are wrong: B (Dissipate means to scatter or lose heat, not manage it.), C (Ignore implies paying no attention to it.), D (Freeze is the opposite of using heat sources.).

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