To hide from they food so they can catch them.
a polar bear needs its food sources and fur to keep it warm
A lot.
Polar bears do not live in the rainforest but they do depend upon it for the oxygen it produces.
A polar bear is a mammal and all mammals need air to breath.
A polar bear would need to adjust a lot of things in order to survive in a desert. Without air conditioning, or millions of years to evolve, a polar bear would likely die in the new environment.
Polar bears need to survive with water, food, nutrients, and they are fur to stay warm
polar bears need to live, so they have to get energy from other animals.
No, the cold does not affect polar bear cubs because they have the same percent of body fat as an adult would need.
It breathes. Simple as that.
track with hills
Most of the animals are not white, the polar bear is not really white they are really black, if you shave a polar bear they are black not white. They need to be white, so they won´t be eaten by their enemies that fast... it´s kind of safer for them. The polar bears are black underneath the white fur so they ca keep their body temperature much better.
Not in the literal sense, but they can really burn up the ice. A typical polar bear can burn along at around 30 miles per hour. Remember: you don't need to be able to out-run the bear...you only need to out-run the people who are with you.