The most similar organism to a polar bear (Ursus maritimus) in the table is the Brown Bear. This is because both polar bears and brown bears belong to the same family, Ursidae, and share many similar characteristics, including their size, body structure, and diet. Tigers and gray wolves belong to different families (Felidae and Canidae, respectively), while a red fox belongs to a different order (Carnivora) and has different physical characteristics and behavior compared to a polar bear.
