Sophia can suggest to her friends to participate in fun run, a daily walk or in a sport tournament. This way, they will be preoccupied with these healthy activities and forget to be involved with drug and alcohol use.
In addition, Sophia can also suggest to everyone to share their time by being a volunteer in a civic activity, which is more meaningful and self-rewarding.
I think it would be kidneys because of the way the question is worded, kidneys are the only things you have 2 of that also is involved in the digestion of foods.
