What is Tide, why it occurs and how it is important for human life? -Geography

What is Tide, why it occurs and how it is important for human life? -Geography
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The alternate rise and fall of the sea is called tides. High  tides help in navigation. This helps  the ships to arrive at the harbour more easily. The high tides  also help in fishing. Tides  are also helpful  in generating electricity.
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