## **Core Concept**
Puberty is a complex process involving the maturation of the reproductive system, triggered by the pulsatile release of **gonadotropin-releasing hormone (GnRH)** from the hypothalamus. This leads to increased secretion of **luteinizing hormone (LH)** and **follicle-stimulating hormone (FSH)** from the anterior pituitary gland. These hormonal changes are crucial for the development of secondary sexual characteristics.

## **Why the Correct Answer is Right**
The correct answer involves understanding the physiological changes that occur during puberty. At puberty, there is an increase in the production of sex hormones, such as **estrogen** in females and **testosterone** in males. This increase is responsible for the development of secondary sexual characteristics, such as growth of body hair, deepening of the voice in males, and breast development in females.

## **Why Each Wrong Option is Incorrect**
- **Option A:** [Not provided, assumed incorrect based on the context]
- **Option B:** [Not provided, assumed incorrect based on the context]
- **Option C:** [Not provided, assumed incorrect based on the context]

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that the onset of puberty is marked by the appearance of **testicular enlargement** in males (due to increased testosterone) and **breast bud formation (thelarche)** in females (due to increased estrogen). These changes are critical for assessing the onset and progression of puberty.

## **Correct Answer:** .