Answer:
The answer is C :40
Explanation:
According to heymsfield, 30 to 40 percent of a healthy person's body mass is made up of skeletal muscles.
Your muscles. Some muscles are “voluntary.” They
are the ones you control, the ones that let you exercise—or
relax. Some muscles are “involuntary.” They just do their
job with no effort on your part—like your heart muscles.
Health - related fitness.
I hope this helped :)
Cardio- exercises like running, cycling, and rowing
