Define adolescence.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Term**: Begin by recognizing that adolescence is a specific stage in human development.

2. **Defining the Period**: Adolescence is defined as a period of life that typically occurs between the ages of 10 to 19 years.

3. **Physical Changes**: During this time, individuals experience significant physical changes in their bodies. These changes are primarily due to hormonal changes that occur during puberty.

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