Question

question 20 of 29
coral reefs support more species per unit area than any other marine environment on earth. what role do coral reefs play in the health of the biosphere?
a. their colorful organisms attract millions of tourists each year.
b. coral reefs require very specific environmental conditions.
c. coral reefs tend to drain nearby wetlands of stagnant water.
d. their productive organisms play a major role in nutrient recycling.

Explanation:

The question asks about the role of coral reefs in the health of the biosphere. Option A is about tourism, not biosphere - health related. Option B just states their environmental requirements, not their role in biosphere health. Option C is incorrect as coral reefs do not drain wetlands of stagnant water. Option D is correct because the organisms in coral reefs are involved in nutrient - cycling which is crucial for biosphere health.

Answer:

D. Their productive organisms play a major role in nutrient recycling.