Options are: (I). food gathering. (II). vocalization. (III). spontaneous mutation. (IV). showing aggression.
Given those answer options, answer the question: 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: How do the male gorillas show display behaviors? A:
A:
(IV).