Black Bear

These guys are shy, mostly keeping to themselves and their berry hunts. If you encounter one make yourself look big, make noise, and it’ll likely back off. They’re more interested in your picnic basket than your flesh.
Brown Bear ( Grizzly)

Brown bears are omnivores, but they lean more carnivorous than their black bear cousins. And when it comes to humans, brown bears are less tolerant than black bears. If you encounter one, confronting or running isn’t an option, your best bet is to play dead and hope it loses interest.
White Bear ( Polar )

Polar bears are hyper-carnivores, meaning their diet is almost entirely meat and unlike black and brown bears, which usually prefer to avoid humans, polar bears actively hunt anything when they’re hungry. And in the Arctic, they’re almost always hungry. Your best bet is not be in sight of polar bear because there’s no chance of survival.