If a person is breathing normally, which of the following could prevent him from using his body to exercise normally?
a not getting enough sunlight, because cells need sunlight to function
b not getting enough sleep, because the body only makes energy for exercise while asleep
c not eating enough food, because cells need molecules from both food and air to work
d nothing, because he would be able to exercise normally as long as his cells are getting molecules from the air

If a person is breathing normally, an activity or action that could prevent him from using his body to exercise normally is: C. not eating enough food, because cells need molecules from both food and air to work.What is an aerobic exercise?An aerobic exercise can be defined as all forms of physical activity that an individual engages in, so as to increase the heart rate (from low to high intensity) in response to the level of oxygen which is required by any activated or working muscle and cells in the human body.Generally speaking, some examples of an aerobic exercise or cardio-fitness activity include the following:WalkingSkiingCyclingSwimmingJoggingAccording to the Frequency, Intensity, Time, and Type (FITT) principle, it is very important for an athlete that is engaging in aerobic exercise or cardio-fitness activity to eat an adequate quantity of food and breathe well, so as to enable his or her cells function properly.Read more on exercise here: brainly.com/question/18026113#SPJ1