system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5 : why do people scream when they are in pain?

We do we scream/yell when we are in pain? And is this the case for animals and insects to?
gpt
- To alert others to possible danger
- To alert others that you need assistance
- To discourage your attacker
- To stimulate hormone release (e.g adrenaline, endorphins)

Many animals have similar alert and distress calls. Some also release specific scents. Even some plants release chemicals when damaged that nearby plants can react to.