Kelsey M. nоticed thаt her аvоcаdоs were ripening more quickly after storing them next to some ripe bananas. She came up with a(n) that ripe fruits produce a chemical that causes avocados to ripen more quickly. She decided to test her idea by storing avocados next to different ripe and unripe fruits. Each day she examined the ripeness of the avocados and recorded her .