NEET BIOLOGY

Detailed explanation-1: -They rely on the energy stored in their blubber. InsulationBlubber also insulates marine mammals, or helps keep them warm in icy waters. This insulation is necessary. Mammals are warm-blooded, meaning their body temperature stays about the same no matter what the temperature outside is.

Detailed explanation-2: -Thanks to special adaptations, such as a thick layer of blubber, two layers of fur, compact ears, and a small tail, polar bears can withstand temperatures as low as-50° Fahrenheit. Polar bears use snow like a towel. First they shake off the water; then they roll in the snow to dry off.

Detailed explanation-3: -They have a thick layer of body fat, which keeps them warm while swimming, and a double-layered coat that insulates them from the cold Arctic air.

Detailed explanation-4: -The correct option for this question will be A white fur, fat below skin, keen sense of smell which helps the polar bear to survive in extreme cold.