Answer the following question given this paragraph: 

In many species, display behaviors—rather than actual physical attacks—are used to show aggression. This helps prevent injury and death. Male gorillas, for example, are more likely to put on a display of aggression than to attack another male. In fact, gorillas have a whole series of display behaviors that they use to show aggression. They beat on their chest, dash back and forth, and pound the ground with their hands.


Q: In many species, display behaviors, like a gorilla beating on its chest, are used instead of actual physical attacks to show what?


A:
aggression