1.The ossification of epiphyseal ends of the long bones end by the time the individual attains the age of 20 to 21.So,the chances are 50-50 %
2.Exercise will not INCREASE your HEIGHT because bones can't be exercised and this is where your HEIGHT comes from.Your bones will continue to grow up until about age 25 but could stop sooner.You will grow as tall as you are gonna be by then .Just be healthy!!
.Your bones need phosphorus,calcium, and magnesium
while your muscles need water,protein and carbohydrates to grow. Since you are growing taller, both your muscles and bones are getting bigger and longer.