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Atolls are geological formations made up of :

Atolls are geological formations made up of :-example-1
User YPK
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1 Answer

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15 votes

The correct answer B. Coral.

Step-by-step explanation

An atoll is a geological formation that is an island of coral origin that forms in the ocean. Atolls are generally ring-shaped. These islands are formed when reefs formed around a volcanic island once it sinks into the ocean. Many of the atolls on earth are in the Pacific Ocean area. According to the above, the correct answer is B. Coral.

User Jeff Ogata
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