What are some adaptations polar bears have developed for survival in the tundra?

Some adaptations that polar bear have to survive easily in tundra region are:

They have two layers of fur. Both the fur have different colors. One of the fur is white in color so that the bears can easily camouflage with the white snow that is present in the tundra region.

They have a layer of fat on their body which helps them to survive in colder region.

They hide in caves during the time of pregnancy to protect their children from danger.

the answer to this question is a

this is math not biology xd