AP BIOLOGY

Detailed explanation-1: -Male chimpanzees defend their community’s territory against neighboring chimp communities and will kill members of other groups. Chimpanzees are the only species other than humans to carry out coordinated attacks on each other, Live Science previously reported.

Detailed explanation-2: -Chimpanzees protect themselves by spending a great deal of time in trees, a place where many of their common predators do not go. When on the group, foraging chimpanzees are often protected by lookouts that keep watch and warn them of predators.

Detailed explanation-3: -Chimpanzee friends reciprocate. They groom each other, share meat with each other, and support each other in disagreements with other chimpanzees, Muller observed. And friendships can persist over many years. In laboratory studies, chimpanzees trust their friends more than other individuals in risky situations.

Detailed explanation-4: -In the wild they’re pretty aggressive. They have warfare among groups, where males kill other males, and they have been known to commit infanticide. Aggression is a common part of the chimpanzee behavior, whether it’s between or within groups.