system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are moguls formed?

As in the type you see when you go skiing, not the business people.
gpt
Turning carves away a tiny layer of snow.  If a lot of skiers all turn in the same place it will make a rut.  Create a lot of ruts, and you get a mogul field. Moguls start small with shallow ruts between them.  Some skiers turn on top of the moguls, but most aim for the ruts or the area just uphill of the ruts.  Over time the ruts get deeper and deeper.