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Set 5: Command of Evidence

Explanation

Answer: D

PASSAGE

Coral reefs are often called the 'rainforests of the sea' because they support an estimated 25% of all marine species despite covering less than 1% of the ocean floor. They are threatened by rising ocean temperatures, which cause coral bleaching—a condition where corals expel the algae living in their tissues.

What makes coral reefs ecologically significant, according to the text?

A. They cover most of the ocean floor.
B. They support a disproportionately high percentage of marine life.
C. They are resistant to climate change.
D. They are essential for shipping routes.✓ Correct

Detailed Explanation

The text says reefs 'support 25% of all marine species despite covering less than 1%. ' This is a disproportionately high support relative to size.

Key Evidence:

• "25% of all marine species"

• "less than 1% of the ocean floor"

Why others are wrong: A (They cover LESS than 1%.), C (They are 'threatened by rising ocean temperatures.'), D (Shipping is not mentioned.).

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