Many species of ants are scavengers. They pick up what others leave behind.
Take this chip, for example.
Someone had spilled some chips on the ground. Those ants are doing a terrific job of cleaning up the mess.
This is a kibble of dog food someone had tossed out at a highway rest stop.
Ants also clean up dead animals.
Here's a dead cricket that fell on the sidewalk.
It won't be long before it is processed and hidden away underground.
Imagine what our world would look like if these creatures didn't clean up for us.