Define puberty.

Explanation

**Step-by-Step Solution:**

1. **Definition of Puberty**: Puberty is a developmental phase during which individuals become capable of sexual reproduction. It marks the transition from childhood to adulthood.

2. **Age Range**: This phase typically occurs between the ages of 13 to 19 years, although it can vary slightly among individuals.

3. **Hormonal Changes**: During puberty, the body begins to produce sex hormones. In males, testosterone is the primary hormone, while in females, estrogen and progesterone are the key hormones.

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