Black Bear
Black bears are very shy. They're usually busy looking for berries in the forest. If you encounter one, try standing tall, making yourself look bigger, and making a lot of noise. They'll likely back off. Trust me, they're more interested in your picnic basket than your meat.
Brown Bear (Grizzly)
Brown bears are omnivores, eating anything, but they prefer meat to their cousins, the black bears. Now, when it comes to humans, they're a bit mean . If you encounter one, don't try to fight or run away. It's useless. The only way to do it is to play dead. Yes, really, just collapse and hope it gets bored and goes looking for other prey.
Polar Bear
Polar bears are on a different level. They're hyper-carnivores , meaning they eat 90% meat. And, unlike their black or brown counterparts, which usually shy away from humans, polar bears actively hunt anything. If they're hungry (and in the Arctic, they're almost always hungry), you'll be seen like a walking burger. The best way? Avoid being seen at all. If you're spotted, let's be honest, your chances of survival are slim to none.