Question

coral reefs wre formed by; A) Volcanicity B)Denudation C)Marine D)Polyps

Answer 1

Answer:

Option D

Explanation:

Coral reefs begin to form when free-swimming coral larvae attach to submerged rocks or other hard surfaces along the edges of islands or continents. As the corals grow and expand, reefs take on one of three major characteristic structures — fringing, barrier or atoll.

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Answer 2

Answer:

D) Polyps

Explanation:

Coral polyps are tiny, soft-bodied organisms related to sea anemones and jellyfish. At their base is a hard, protective limestone skeleton called a calicle, which forms the structure of coral reefs.