Which nutrient gives energy? A. Proteins B. Vitamins C. Carbohydrates D. Minerals

Carbohydrates are the primary source of energy for the body, broken down into glucose for fuel.

Answer: A. Carbohydrates

$$\boxed{A}$$

Proteins provide amino acids essential for building and repairing tissues, muscles, and organs.

Answer: A. Proteins

$$\boxed{A}$$

A balanced diet requires proteins, carbohydrates, vitamins, minerals, fats, and water—not only one type.

However, given options emphasizing "only" for some, all essential nutrients from all groups are needed (no single "only" option fits).

Answer: None of the "only" options; all nutrients

Since options appear limited to single/only choices, standard answer is all major food groups/nutrients.

$$\boxed{\text{All nutrients/food groups}}$$

Water is vital but classified separately from macronutrient food groups (proteins, carbs, fats).

Proteins for growth/repair confirmed.

Final answers bolded above.