They can live there because of adaptations, such as thick fur, abilities to find food, etc.
adaption
Evolutionary adaptions.
Some other animal species that live with Polar bears are:WolvesSealsHareWalrusHumansetc.
its the habitat were animals live
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 … 
No the world is not an ecosystem. An ecosystem is where animals live in a habitat
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
The main ecosystem the white tail deer live is the forest ecosystem. Over populations can have harmful effects on shrub and plant life in the the ecosystem.