6

Set 2: Inferences (Intermediate)

Explanation

Answer: B

PASSAGE

Coral bleaching occurs when rising ocean temperatures stress coral organisms, causing them to expel the symbiotic algae that give them color and nutrients. Some coral species can recover if temperatures decrease, but prolonged heat waves often result in coral death. Current climate projections suggest such heat waves will become more frequent.

Based on the passage, what is the likely long-term outlook for coral reefs?

A. Coral reefs are completely unaffected by climate change.
B. Increasing heat wave frequency poses a significant threat to coral survival.✓ Correct
C. All coral will recover quickly from bleaching events.
D. Coral death only occurs during brief temperature spikes.

Detailed Explanation

Prolonged heat waves kill coral; climate projections show more heat waves = growing threat.

Key Evidence:

• "prolonged heat waves often result in coral death"

• "heat waves will become more frequent"

Why others are wrong: A (Rising temperatures cause bleaching and death.), C ('Prolonged heat waves' prevent recovery.), D ('Prolonged' (not brief) heat waves cause death.).

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