**Core Concept**
Tooth movement in orthodontics involves the coordinated action of various cellular and molecular processes. The ideal tooth movement involves the activation of bone remodeling pathways, where osteoclasts resorb bone on the pressure side, and osteoblasts deposit new bone on the tension side. This process allows for the efficient movement of teeth with minimal trauma to the surrounding bone.

**Why the Correct Answer is Right**
The correct answer is related to the resorption process on the pressure side. The pressure side is the area where the orthodontic force is applied, leading to the activation of osteoclasts. These cells, derived from the hematopoietic lineage, are responsible for the resorption of bone matrix through the release of hydrochloric acid and proteases. The RANK-RANKL-OPG system plays a crucial role in the regulation of osteoclast activity. The RANKL protein, expressed on the surface of osteoblasts and stromal cells, binds to its receptor RANK on osteoclasts, promoting their activation and differentiation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the resorption process on the pressure side during orthodontic tooth movement.

**Option B:** This option is incorrect because it refers to the tension side, where bone deposition occurs, rather than the pressure side where resorption takes place.

**Option C:** This option is incorrect because it is a description of the overall process of bone remodeling, but does not specifically address the resorption process on the pressure side.

**Clinical Pearl / High-Yield Fact**
During orthodontic tooth movement, the pressure side is characterized by a transient period of bone resorption, followed by a lag phase, and finally, a bone deposition phase on the tension side. Understanding this sequence of events is crucial for predicting and managing tooth movement.

**Correct Answer:** C. Bone remodeling