The cells responsible for bone resorption are
osteoclasts
osteoblasts
fibroblasts
osteocytes

osteoclasts

Explanation:

Osteoclast is a cell that makes up the bone matrix, quite large compared to other cells, multinucleated, and is involved in resorption and remodeling of bone tissue. It has a lysosome-rich cytoplasm, numerous mitochondria, and a highly developed Golgi complex.

Although it was once believed that osteoclasts came from osteoprogenitor cells, they are now known to come from bone marrow derived from coalescent monocytes.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.