Aggressive behavior refers to the attacks or battles between individuals of the same species. In the animal kingdom, individuals of the same species often attack or fight each other because they compete for food, spouses and nests and fields. Reproductive behavior: behaviors related to animal reproduction, such as nesting, courtship, mating, incubating eggs, feeding, etc. Social behavior is an animal clustering behavior in which certain organizations are formed within the group, and there is a clear division of labor among members, and some higher animals also form ranks. Defensive behavior: In order to protect themselves, all kinds of behaviors to defend against enemies are defensive behaviors, such as running away, playing dead, releasing odor, protecting colors and warning colors.

So choose: C.