There are actually a lot of types of food pattern that the usda have developed through the years. They have created the food patterns to help the people to carry out their diet guidelines easier recommendations. In this pattern you can see what you are going to eat for the whole or the amount of a portion that you need to eat.
It's a hard one between the last two. It would depend on the circumstances and the teen themselves. Generally speaking, teens who have parents that enforce things don't act out but on occasion some have decided to "rebel" and take an alternative route.
However, for the sake of this question, I'm going to say a teen whose girlfriend broke up with him but acts as if nothing had happened.
Pretty sure it’s studies because you read textbooks to learn more about the subject. So B.Studies