Define hygiene.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Term**: Start by recognizing that hygiene refers to practices and conditions that promote health and cleanliness.

2. **Definition**: Hygiene can be defined as a set of practices that individuals engage in to maintain their personal health and cleanliness.

3. **Importance of Hygiene**: Explain that hygiene involves keeping our surroundings clean, which helps to prevent the spread of diseases. When we maintain cleanliness, we reduce the chances of dirt and germs that can lead to infections.

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