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    Question

    What is the characteristic shape of an

    'atoll'?
    A Square Correct Answer Incorrect Answer
    B Triangular Correct Answer Incorrect Answer
    C Pyramid Correct Answer Incorrect Answer
    D Ring-shaped Correct Answer Incorrect Answer

    Solution

    An atoll is a ring-shaped coral reef, island, or series of islets. An atoll surrounds a lagoon partially or completely. These unique geological formations are typically found in tropical ocean waters and are formed from the coral-building activities of marine organisms.

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