1..Why are cloudy nights warmer than clear nights?
2..Why does polar bear close its nostrils when it swims underwater?
3..What is the relation between deforestation and environment?
4..Why is there snow everywhere in the poles?
2..Why does polar bear close its nostrils when it swims underwater?
3..What is the relation between deforestation and environment?
4..Why is there snow everywhere in the poles?
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2.if the cool water enters into the nostrils of the polar bear it will die.so,it trys to close they nostrils while swimming in water