<span>The correct answer is, migrating into the land during summer polar bears give birth and hunt.
Polar bears are forced to swim long distances with their mothers and that time icy Arctic habitat melt and appear to have a higher mortality rate.
The polar bears' feet have been pilled under the sea ice because of climate change which forces some of the polar bears to swim a long distance to look for habitat and food. Polar bears hunt, feed and give birth on land or ice. They are not naturally aquatic creatures.</span>