system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is every staple crop around the world some kind of starch (wheat, rice, potatoes, maize, ect..)?
gpt
Starch is a complex carbohydrate which means that it is broken down into sugar by the body. So it's a source of energy.

That's what makes these staple crops, they are grown because they are an efficient source of food energy.