Define nutrients and give their classification.

Explanation

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

1. **Definition of Nutrients:**
- Nutrients are chemical substances that are essential for the growth of the body and the production of energy. They are obtained from the food we consume.

2. **Classification of Nutrients:**
- Nutrients can be classified into two main categories:
- **Macronutrients:** These are nutrients required in larger quantities. They include:
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