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Answer: Seven natural phenomena are described.
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Answer: Lonar Crater Lake contains a saline lake.
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Answer: They are described at Kumbalangi in Kerala.
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Answer: The Ganga, Brahmaputra and Meghna are mentioned.
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Answer: It is the period when sea water moves away from shore.
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Answer: It is a visual effect that makes something appear different from its actual physical arrangement.