Question : To keep warm, polar bears have a layer of _________ under their skin.
Option 1: muscle
Option 2: fat
Option 3: cartilage
Option 4: hair
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Correct Answer: fat
Solution : The correct option is fat .
Polar bears have a thick layer of subcutaneous fat that serves as a heat-insulating layer under their skin. When swimming and during the arctic winter, this is extremely crucial. The skin under the polar bear's fur is black, which can only be seen on the snout.
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