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Question
Ring-shaped coral reefs are known as
Ring-shaped coral reefs are known as
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Solution
The correct option is D Atolls
An atoll is a ring-shaped coral reef, island, or series of islets. An atoll surrounds a body of water called a lagoon. Atolls develop with underwater volcanoes. First, the volcano erupts collecting on the seafloor. As the volcano continues to erupt, the seamount's elevation grows higher, finally breaking the surface of the water. Thus the top of the volcano becomes an oceanic island. Then corals begin to build a reef around the island which is ring-shaped. Thus the correct answer is option A.
An atoll is a ring-shaped coral reef, island, or series of islets. An atoll surrounds a body of water called a lagoon. Atolls develop with underwater volcanoes. First, the volcano erupts collecting on the seafloor. As the volcano continues to erupt, the seamount's elevation grows higher, finally breaking the surface of the water. Thus the top of the volcano becomes an oceanic island. Then corals begin to build a reef around the island which is ring-shaped. Thus the correct answer is option A.
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