**Step-by-Step Text Solution:**
1. **Definition of Macronutrients:**
- Macronutrients are essential components of food that provide the necessary nutrition for the body.
2. **Role of Macronutrients:**
- They are crucial for various bodily functions, including growth, energy production, development, and other metabolic activities.
3. **Requirement in Large Amounts:**
- The term "macro" indicates that these nutrients are required in large quantities compared to micronutrients (which are needed in smaller amounts).
4. **Examples of Macronutrients:**
- The primary macronutrients include:
- **Carbohydrates:** The main source of energy for the body.
- **Fats:** The second major source of energy.
- **Proteins:** Used for energy when carbohydrates and fats are insufficient.
5. **Conclusion:**
- In summary, macronutrients are vital for overall health and well-being, and they include carbohydrates, fats, and proteins.
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