system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do fruits ripen after they are picked from the trees?
gpt
There are two kinds of ripening, climacteric & nonclimacteric.

Nonclimacteric have seperation issues and can't grow unless they are connected to their parent because they are too lazy to produce their own sugar.

Climacteric don't have seperation issues instead they like to get high off of a hormone called "ethylene" which activates enzymes which break down starch into sugar. So basically they can produce sugar on their own without a parent tree.

Hope that helps.