Meat because it had alot of protein
Answer:
A
Explanation:
because the
Cirulatory system-The skeletal system has many different functions, including supporting the body and giving it shape, protecting internal organs, providing attachment surfaces for skeletal muscles, allowing body movements, producing blood cells, storing minerals, helping to maintain mineral homeostasis, and producing endocrine hormones
His muscles are getting stronger and have to break down to do so and that process hurts.