How do models increase their height so rapidly and stay skinny at the same time?

well i'm 14 and i wanna become tall and skinny like those models i know its genetics too but i have heard dat eatin less to become skinny will hamper ur growth and ur height will stunt but then how do these models starve themselves and still grow taller and they're young as young as 15and 16 sooo how does that happen??????????????????????? D: