Sonali Tikale
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2 Answer(s)
Lalit Patel
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Posted 5 year ago Lalit Patel

Corals are animal in sea that uses calcium to make wall or rock like structure that known as coral reef.

Mitesh Sharma
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Posted 5 year ago Mitesh Sharma

Corals are animal in sea that uses calcium to make wall or rock like structure that known as coral reef.