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Health

3. The essential nutrient that serves are the main building blocks for the body is

A. Protein
B. Fats
C. Carbohydrates
D. Vitamins

I chose D, though I think it's A. I can't choose.

The correct answer is A. Protein serves as the main building blocks for the body, helping to build and repair tissues such as muscles, bones, and skin. Vitamins, fats, and carbohydrates are also essential nutrients, but they do not serve as the main building blocks for the body.