Why bear stand on hind legs
:heavy_check_mark: For a more apparent vision, so that they can see distance more than they can see when standing on all four legs.
:heavy_check_mark: For a more clear smell, their bear smell sense is powerful and can observe food and female polar bears from miles.
:heavy_check_mark: In a standing position, they earn more height and can smell the smell carried by the wind more certainly.
:heavy_check_mark: A mother polar bear stands up to watch whether its cubs are comfortable and whether a male polar bear is searching for her or not.