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Ans2 Hibernation is a period in winter in which animals go to sleep for a long time to save their energy.
Ans3 a) Sleeping is necessary for humans and animals because during the sleep our body gets recharged and after waking up we feel fresh and energetic to do our work.
Sorry, but the b part of Q3 is not completely visible so, I can't answer it.
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Hibernation is when an animal slows it's heart rate to save energy and survive the winter eating much . five hibernating animals are : bears, turtles, snakes, frogs and groundhogs.
sleeping is Nesseccey for humans because that allows your body and mind to recharge , leaving your reffeerd and alert when you wake up, sleeping is Nesseccery for animals because sleep reands an animal quite and still: muscles are not very active while sleeping. sleep makes an animals slower to respond.
Lions - 19 hours per day
giant Armedello - 18 hours per day.
North American Oppussum - 18 hours per day.
Tigers - 18 hours per day.
hope it helps you
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