Question

what is atoll......​

Answer 1

Answer:

An atoll is a ring-shaped coral reef, island, or series of islets. An atoll surrounds a body of water called a lagoon. Sometimes, atolls and lagoons protect a central island. 

Answer 2

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Atoll- An island shaped like a ring with a lake of salt water ( a lagoon) in the middle is called atoll.

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