Which of the following usually develop(s) during childhood?
a. motor coordination
b. reasoning skills
c. long bones to 80 percent of adult height
d. all of the above

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

its temperature is increasing. this causes molecular vibrations to increase.