## Core Concept
Bone remodeling is a lifelong process where mature bone tissue is removed (resorbed) and new bone tissue is formed. This process is crucial for maintaining bone health, calcium homeostasis, and repairing micro-fractures. It involves the coordinated action of osteoclasts (bone-resorbing cells) and osteoblasts (bone-forming cells).

## Why the Correct Answer is Right
The correct answer, although not directly provided, will be evaluated based on the explanations of each option. Generally, in bone remodeling, osteoclasts first resorb bone, followed by osteoblasts forming new bone. This process is essential for calcium and phosphate metabolism, bone repair, and maintaining bone architecture.

## Why Each Wrong Option is Incorrect
Without specific details on each option, a general approach to evaluating incorrect statements about bone remodeling:
- **Option A:** If a statement claims that bone remodeling only occurs in response to fractures or that it's a static process, it would be incorrect because bone remodeling is a continuous process.
- **Option B:** If a statement suggests that osteoclasts and osteoblasts work simultaneously or that one type of cell can perform both functions, it would be incorrect because, typically, osteoclasts resorb bone before osteoblasts can form new bone.
- **Option C:** If a statement implies that bone remodeling is not under hormonal control, it would be incorrect because hormones like PTH, calcitonin, and others play significant roles in regulating bone remodeling.
- **Option D:** If a statement claims that bone remodeling results in a net loss of bone mass in healthy adults, it would be incorrect because, in a healthy adult, bone remodeling maintains bone mass.

## Clinical Pearl / High-Yield Fact
A key point to remember is that bone remodeling is tightly regulated by various factors including hormones (parathyroid hormone, vitamin D), growth factors, and mechanical stress. Imbalances in this process can lead to conditions such as osteoporosis or Paget's disease.

## Correct Answer: D.