Ocean, The body of salt water that covers nearly three fourths of the Earth's surface, Underground water, Is the best source of drinking water., Waterfall, A natural stream of water falling from a high place., Sea, It is is smaller than ocean., Spring, It is is a water form that flows out from the ground usually cold, and hot if near to a volcano, River, They start from streams and brooks and keep on flowing until they reach the bay, gulf, sea and ocean., Lake, A body of water surrounded by land.

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