system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do animals make/understand eye contact if most of them don’t have a wide array of facial expressions and rely more on body language?

EDIT: I got the answer I was looking for but if you think you have a better one be my guest :)
gpt
Lots of animals use sight as an important tool. For instance, hunting. As such, being aware that something is looking at you can be important. Whether it is to know you are attracting the attention of a predator (freezing when a cat looks at you), or getting noticed by prey (like a cat pausing in its stalk). Even though it isn't being used to necessarily convey an expression, it contains important information, like "danger!"