Is it ok to put self tanner on a sunburn

Ihave a really high metabolism and only weigh 70 pounds (13 almost 14). people always ask me two questions: do you ever eat and how do you eat so much and stay so skinny.i am worried that a high metabolism wont me forever. what are some safe steps i can take to maintain being fit. (also, i already work out i am a dancer so i get cardio a lot)

The process by which the diameter of the bone increases is called? a-metaphysic b-appositional growth c-diaphysics d-epiphysis

What are the two things that all sociologists do in their studies?