foxes lived in forests and grasslands where theie predators are
Every thing froze one winter and didn't unfreeze. some had fur that was thick and they are able to survive. Now they have a new predator to worry about and that is polar bears
The foxes have thicker white fur and are able to run really fast to get away from polar bears. They are able to hold their breathe under water to get fish to eat. they're also able to swim and their fur is hydrophobic so they can't get cold as easy.