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Polar bears are the largest land carnivores, inhabiting the Arctic Circle and its surrounding seas. They are uniquely adapted to thrive in the harsh polar environment, with white fur providing excellent camouflage against snow and ice, and a layer of blubber helping to insulate them from the cold. Their diet primarily consists of seals, which they hunt by waiting for them to surface at breathing holes in the ice. Polar bears are excellent swimmers, capable of swimming long distances in search of food. They are also known to climb onto ice floes to rest and bask in the sun. As a subcategory under "Polar," the polar bear fits into the hierarchy by representing a specific animal species that is uniquely adapted to life in the polar region. It highlights the incredible biodiversity of this extreme environment, showcasing the remarkable adaptations that allow certain animals to thrive in such harsh conditions. The polar bear's presence in the hierarchy underscores the importance of preserving and protecting the fragile polar ecosystem, which is facing numerous threats due to climate change and other human activities.