Question

what are coral reefs....?​

Answer 1

Answer:

CORAL REEF

A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups.

Answer 2

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a ridge of rock in the sea formed by the growth and deposit of coral.

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