Depends on which bear you’re talking about.
This is a hotly contested question, but many believe the answer would depend on the bear. Polar bears typically live in colder climates than grizzly bears do, and they can swim for much longer distances beneath the ice than Grizzly Bears can. The Arctic also lacks any native land-based predators for polar bears to worry about, whereas Grizzly Bears need to be cautious of larger carnivores such as wolves or snow lions. In short, this is an answer that could go either way depending on which species you’re talking about and where it lives! But one thing is certain – neither bear would win easily against something like an elephant. 😉