Sports such as soccer, basketball, squash and tennis may also may improve his cardiovascular fitness. He should also try to intensify and work out more frequent if he wants to improve.
Answer:
B - Proteins
Explanation:
Excluding water and fat, the human body is made up almost entirely of protein. Protein is the main component of muscles, bones, organs, skin, and nails.
Hope this helps!
Please give Brainliest!