Children will most likely gain 4-6 pounds each year until
a. puberty.
c. adulthood.
b. childhood.
d. adolescence

The answer is letter A.

Children will most likely gain 4-6 pounds each year until the end of puberty. Both males and females experience puberty, because this is the turning point of a human body's growth which makes reproduction and the continuity of species possible. Males tend to have reached the peak of their puberty at the age of 25 while females reach the end of theirs between ages 21-24. 

Idon’t really understand your questions

The answer would be true.