Why are all polar bears left-handed

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Polar bears are indeed all left-handed. Other animals such as orangutans and monkeys also have left-handed individuals, but in most animals the ratio of left-handed to right-handed ones is roughly one to one. However, the vast majority of humans are right-handed, with only 10% to 12% being left-handed ； And the vast majority of polar bears are left-handed. And why is that? Apart from genetic factors of the species, there are also reasons determined by animal behavior. This is related to the environment in which polar bears live. As is well known, polar bears live in the southern edge of the Arctic, where there are large areas of floating ice. Polar bears feed on seals, especially ringed seals. They often lie beside the seals’ breathing holes on the ice, waiting, or pounce silently when the seals climb onto the ice to rest. But polar bears have white fur, and when they look underwater from the ice surface, they cleverly cover their black noses with their right hands to hide themselves among the white color, thereby freeing their left hand to hunt.