Why do polar bears get called polar bears?

Polar bears live at the polar region (the Arctic) of the world, and are only found there, unlike other bears. This is why they're called "polar bears."
The polar bear is called a polar bear because it is a bear, and lives in the area of North pole in the Arctic.

So Don't Be Fooled When You Think That Polar Bears Eat Penguins. Because They Live In Diffrent Places.