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. Coral reefs tend to drain nearby wetlands of stagnant water.
B. Their productive organisms play a major role in nutrient recycling.
C. Their colorful organisms attract millions of tourists each year.
D. Coral reefs require very specific environmental conditions.
SUBMIT

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

Explanation:

Coral reefs contain photosynthetic algae that help coral reefs in processing nutrients and contribute in the nutrient cycle.

The process of photosynthesis in corals leads to carbon fixing in which corals transform, carbon dioxide, into organic carbon.  carbon fixing property allows corals to become primary producers.

Dissolve organic matter produced by corals is consumed by several organisms such as crabs, worms, fish, and snails.

Hence, coral reefs maintain the flow of energy and nutrient cycle in the biosphere and the correct option is B.

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