Question

the ongoing process of tearing down and rebuilding bone matrix is called
remodeling.
restoration.
ossification.
osteolysis.
resorption.

Explanation:

Bone remodeling is the continuous process of bone matrix breakdown and rebuilding. Osteoclasts break down bone (resorption) and osteoblasts build new bone. Restoration is a general term not specific to bone matrix process. Ossification is bone - formation from non - bone tissue. Osteolysis is the breakdown of bone without rebuilding aspect. Resorption is part of the breakdown phase of remodeling.

Answer:

remodeling.