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2016-03-22T05:26:42+05:30

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Hibernation is inactivity for a particular time such as polar bear s they remain inactive in winter ss there food is scarce
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2016-03-22T08:37:20+05:30

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Some animals like polar bears remain inactive for a long period of time, usually in winter.their breathing and heart beat slow down. this process of deep sleep is called hibernation. this conserve a lot of energy.
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