Final answer:
Primates defend their territories primarily for resources, not specifically against predators, using display behaviors like chest pounding in gorillas or exhibiting red breasts in robins.
Step-by-step explanation:
The statement that primates defend their territories to defend against predators is false. Primates and other species of animals primarily defend their territories for resources such as food and nesting sites vital for their survival and the survival of their offspring. Territorial behaviors tend to be more prominent among species where resources are scarce. Instead of direct fighting, primates often use display behavior to assert dominance and defend their territory. Examples of this include male gorillas pounding their chests or robins showing their red breast as warnings to other members of their species. The primary purpose of these behaviors is to protect essential resources rather than defending directly against predators.