Final answer:
Moose establish dominance by antler wrestling, a type of display behavior used among many territorial animals like gorillas and deer to communicate with others and avoid actual combat.
Step-by-step explanation:
Moose establish dominance over each other through antler wrestling. This behavior is a form of display behavior which is common among territorial animals. Instead of fighting, which can be dangerous and energy-consuming, animals generally use display behaviors to communicate with and warn off their competitors. For example, male gorillas use display behaviors such as chest pounding and ground thumping to defend their territory. Similarly, male moose use antler wrestling as a show of strength to establish dominance and gain mating opportunities without the need for actual fighting.
Display behaviors are essential in animal communication, particularly concerning territory and courtship. Courtship behaviors, such as the antler clashing of male deer or the special mating songs of some species of whales, are special behaviors that help attract a mate and ensure the survival and success of a species.