Question

new bone growth—results in their bones adding less bone tissue to replace dying tissue. in fact, for every month in space, a person will lose 1.5 to 2% of his or her bone mass, with the hip bone and the lower leg bones most affected. the human body adds bone mass in order to: a. replace dead bone tissue b. make up for a lack of exercise c. relieve stress on non - weight - bearing bones d. keep bone tissue from being discarded

Explanation:

The text states that lack of new bone growth leads to less bone tissue being added to replace dying tissue. So, the human body adds bone mass to replace dead bone tissue.

Answer:

A. replace dead bone tissue