The fruits

In most cases, fruit is non-countable, especially when speaking in a general way. :)

We would use "for" because it is doing something that gives benefit through an action and it is an act for the sake of the object or for a reason 

"to" is just a general way of saying that an action is done at an object, whether good or bad.

Since this is a positive sentence, we can say "for" as a way of saying "for the sake of"

Fruit