Please answer this question, I don't really know how to Describe how grizzly and polar bear evolution may be affected by climate change.

Explanation:

polar bear depend on ice so if it gets really hot out of a sudden the melt will melt away and it would be harder for them to live. and for grizzly bears if gets cold all out of the sudden the rivers where they get food turns to ice they'll food which is what they depend on (fish) will die and without food they'll die too.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.