How can i get rid of extra stomach fat?

I’m 14, 5’5″, and weigh 120 pounds. I don’t really look fat because my stomach is small compared to my chest. But i can tell it has extra flab i can never burn off. What are some good workouts for your lower stomach muscles below your abs that would flatten out my stomach?
i also run and workout atleast every other day for soccer, track, and lax. and under my flab is muscle which is making my stomach bigger is it possible it just won’t go away?