Question

which nutrient serves as a major source of energy?
proteins
fats
carbohydrates
vitamins

Explanation:

Carbohydrates are the body's main energy - providing nutrients. They are broken down into glucose which is used for energy. Proteins are mainly for growth and repair, fats are for long - term energy storage and other functions, and vitamins are essential for various metabolic processes but not a major energy source.

Answer:

C. carbohydrates