What do polar bears eat and how do they live on the land?

Polar Bears eat meat. They eat seals, and penguins, and walruses, and basically anything they can get. Except for maybe leopard seals because those things are crazy but I still bet a polar bear could one on. They live on land because they don't have gills or wings. Where else would they live? Polar Bears have black skin to attract heat from the sun and tons of fur to keep them warm. They can swim, not the greatest but well enough to go after penguins or seals. Polar Bears normally live in caves but they also have crazy sharp claws and can dig little homes for them selves and their babies.