by digging holes
No, they build dens.
Yes
there fur and dens.
Polar bears live in dens. The dens can get up to 98 degrees Fahrenheit (they are made of snow).
up to 4 weeks
Polar bears dig dens to protect themselves from cold winds.
The hibernating polar bears will soon emerge from their dens.
Polar bears cubs are born in something you call dens!!!!!!!!!!!!!!!
They dig up to 4-16 inches deep, it depends really.
They have not adapted. They have a particular habitat, the Arctic ice, and a particular prey, seals, that can only be caught in their dens under the ice. The ice is melting earlier and earlier every summer, so polar bears have a shortened feeding time during winter to build up their body fat to last through the summer. Weakened female bears don't produce cubs.
the usually don't build them. they tend to sleep in dens and caves sometimes even big enough trees.
They have thick fur. They also make their dens on ice orland for their dormant (not exactly hibernating) time. Polar bears are thought to have diverged from the brown bear during a period of glaciation in the Pleistocene epoch.