Question

the nutrient responsible for growth and repair of muscle and other tissue is
carbohydrate
fat
protein
water

Explanation:

To determine the nutrient for muscle growth/repair:

• Carbohydrates provide energy, not tissue repair.
• Fat is for energy storage/insulation.
• Protein is made of amino acids, essential for building/repairing muscle and other tissues (e.g., enzymes, hormones).
• Water is for hydration, not tissue growth/repair.

So protein is the correct nutrient.

Answer:

C. protein (assuming the options are labeled as A. carbohydrate, B. fat, C. protein, D. water; if the third option is "protein", that's the answer.)