What is the first stage of adolescent growth?
a. height
b. weight
c. change in body composition
d. emotional growth

2+ years late of an answer, but the answer is a. height :)

Adolescence is a time for growth spurts and puberty changes.  The shape, height and strength of teens' bodies changes dramatically in this period.  The first stage of adolescent growth is height. Correct A

Height increases in stage two of puberty, which is approximately between the ages of eight and fourteen for girls and approximately between ages nine to 15 for boys.  

what effect does exercise have on the nervous system?

the answer is c.