Why are gorillas the quietest?

Emotional expression, reduce consumption. According to Netease News Network.

1. Gorillas tend to express their anger or their strong emotional reaction in nonverbal ways. This behavior pattern helps to maintain the harmony and tranquility of their group.

2. Making sound is an energy-consuming behavior. For gorillas, it is necessary to constantly move and find food in the jungle, so it is very important to reduce unnecessary energy consumption.