2 years ago

PLEASE HELP ME! ILL MARK BRAINLIEST!

Biology

1 answer:

snow_lady [41]2 years ago

4 0

Answer:

ExplanationA 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.

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