I think the answer is C. increasing cellular respiration in muscle tissues
hope i can help ✨
Answer:
Hair and nails are mostly made of protein. Your body uses protein to build and repair tissues. You also use protein to make enzymes, hormones, and other body chemicals. Protein is an important building block of bones, muscles, cartilage, skin, and blood.
Explanation:
Sea level - 100%
mid-level elevation - 4500M and 57%
Peak - 8850M and 33%