system
Given the following post, respond as if you're commenting on Reddit:
human
How is a raisin chemically different to a grape? What has happened to everything in the grape when it turns into a raisin?
gpt
A raisin is a more concentrated grape...when the grape is dried all of the water (well almost all of it) is removed so the compounds that make the 'grape' flavor and all the sugars are more concentrated giving you the raisin flavor.