system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do hamsters like running?

I have seen so many videos of hamsters running around in the cages, on wheels, etc. What drives this need of theirs?
gpt
It's not just hamsters, but many animals, and it's not the wheel they like, it's the running. Hamsters, like many other animals, do a lot of running in the wild, and can cover many miles in as single day. Obviously they can't do that on flat ground in a cage, so the wheel lets them run and get out all of that energy that they would normally do in the wild from the confines of their cage.

It's really not that different to why humans use treadmills. Our bodies were meant to travel long distances to hunt and gather. Now that most of us don't do that anymore, we still need to exercise and move around, so we hop on the treadmill instead.