Biology

The correct answer is C.protein.

Explanation:

Protein is essential for the repair and growth of muscle tissue. When you exercise, especially during strength training or intense physical activity, your muscle fibers experience small tears. Protein helps repair these tears and build new muscle tissue, making muscles stronger and larger over time.

Here’s a quick breakdown of the other options:

A.Carbohydrates: Carbs are the body's primary source of energy, especially for short bursts of activity and endurance exercise, bu...