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Q.
Which of the following coral reefs is horse shoe shaped reef that encircles a lagoon but not an island?
Animal Kingdom
Solution:
An atoll reef is also called coral island or lagoon island which is circular or horse shoe shaped reef that encircles a lagoon but not an island. It may be complete or broken by a number of channels.
e.g. - Lakshdweep and Maldive islands in Indian Ocean.