**Core Concept**
Secondary hyperparathyroidism is a condition characterized by the excessive secretion of parathyroid hormone (PTH) in response to low calcium levels in the blood, often due to chronic kidney disease, vitamin D deficiency, or malabsorption of calcium.

**Why the Correct Answer is Right**
The correct answer involves the pathophysiological mechanism underlying secondary hyperparathyroidism. In this condition, the parathyroid glands are stimulated to produce more PTH in an attempt to increase calcium levels in the blood. PTH acts on the bones to increase calcium release, on the kidneys to increase calcium reabsorption, and on the intestines to increase calcium absorption. However, in secondary hyperparathyroidism, the increased PTH secretion is not sufficient to correct the underlying calcium deficiency, leading to continued stimulation of the parathyroid glands and eventual hyperplasia.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the pathophysiology of secondary hyperparathyroidism.
**Option B:** This option is not a characteristic of secondary hyperparathyroidism.
**Option C:** This option is incorrect because it does not accurately describe a feature of secondary hyperparathyroidism.

**Clinical Pearl / High-Yield Fact**
In secondary hyperparathyroidism, the increased PTH secretion can lead to bone resorption, which can result in osteoporosis and increased risk of fractures.

**Correct Answer: C. Bone resorption**