In girls, puberty starts at the age of

Options

A. eight years
B. seven years
C. eleven years
D. nineteen years.

Explanation

**Step-by-Step Solution:**

1. **Understanding Puberty**: Puberty is a developmental phase that marks the transition from childhood to adulthood. It involves significant physical, emotional, and hormonal changes.

2. **Identifying Changes During Puberty**: In girls, puberty is characterized by primary sexual characteristics such as the onset of menstruation and secondary sexual characteristics like breast development and the growth of pubic hair.

3. **Age Range for Puberty in Girls**: Puberty in girls typically begins between the ages of 11 to 13 years. This is the age range during which most girls will start to experience the changes associated with puberty.

4. **Key Milestone**: The onset of menstruation is a key indicator of puberty in girls. It usually occurs around the age of 12, but can start as early as 11.

5. **Conclusion**: Therefore, the age at which puberty starts in girls is approximately 11 years old.

**Final Answer**: In girls, puberty starts at the age of 11 years.

---