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

This question requires you to identify evidence that supports a claim. The text says reefs 'support 25% of all marine species despite covering less than 1%.' This is a disproportionately high support relative to size. The best evidence directly and explicitly supports the stated claim without requiring assumptions. Match specific textual details or data points to the claim being made. The correct answer provides clear, direct support. Strong evidence directly addresses the claim without requiring additional interpretation. When evaluating options, look for quotes or data that explicitly support the statement. Weak evidence may be tangentially related but doesn't provide direct proof.

Key Evidence:

• "25% of all marine species"

• "less than 1% of the ocean floor"

Why others are wrong: A (They cover LESS than 1%.), B (This option is incorrect.), C (They are 'threatened by rising ocean temperatures.').