Question

what structure is the site of bone growth in length?
a primary ossification center
b epiphyseal plates
c periosteum
d none apply.

Explanation:

The epiphyseal plates, also known as growth plates, are responsible for the longitudinal growth of bones during childhood and adolescence. The primary ossification center is involved in initial bone - formation, and the periosteum is related to bone growth in width and repair.

Answer:

B. Epiphyseal plates