They can live there because of adaptations, such as thick fur, abilities to find food, etc.
Evolutionary adaptions.
Some other animal species that live with Polar bears are:WolvesSealsHareWalrusHumansetc.
live there
=Ecosystem is the habitat the animal lives in and the enviroment is the surroundings of where the animals live in....==Ecosystem is the habitat the animal lives in and the enviroment is the surroundings of where the animals live in....==Ecosystem is the habitat the animal lives in and the enviroment is the surroundings of where the animals live in....=
Type your answer here... no
An ecosystem is a place where plants and animals ( maybe humans ) live and animals and plants live in the desert so … 
Depends which polar region you are interested in. Different types of animals live in the two polar regions. Polar bears, e.g., live only in the northern polar regions, whilst penguins live only in the southern polar regions. Some animals, e.g. seals, live in both regions.
polar bear
polar bears
polar bears need to live, so they have to get energy from other animals.
polar bears live in halt
they are animals that live in the cold