system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How wine is made.

Also, is making champagne much different?
gpt
Yeast is the real secret.  It's used in a lot of things, and it loves to eat sugars.  When it eats sugar, it poops out alcohol and burps carbon dioxide.  Some kinds of  yeast make more carbon dioxide and some make more alcohol.  The kind in bread makes mostly carbon dioxide and that's what makes bread rise.  The kind in wine makes a lot of alcohol.  The kind they use to make beer is in between (usually).

To make wine, they take grapes (which have sugar in them naturally) and crush them up to get the juice out. Then they add high alcohol yeast to the juice and let it go to town.  The yeast turns the sugar into alcohol and you have wine.  If you let the yeast eat sugar until the alcohol concentration is high and it kills them (the same way hand sanitizer kills germs) and then bottle it  you get wine.  If you have a yeast that can stand a lot of alcohol before it dies and bottle it when the yeast hasn't eaten all the sugar you end up with sugar in the bottle with yeast.  The yeast left in the bottle eats the sugar left in the bottle and their carbon dioxide burps carbonate it giving you champagne.