Answer:
A. Cohort study
Explanation:
It is basically a cohort study because in this we can evaluate the incident rate at a particular time for a particular disease. .
The main factor that controls the rate of breathing is..
A.) concentration of carbon dioxide.
If we think about it.. When we breath in oxygen, right away it enters your lungs and turns into carbon dioxide. Well since your lungs need to process oxygen and bring oxygen into the blood stream. Then as soon as the oxygen comes inside (inhale) the oxygen turns into carbon dioxide and you breath it out (exhale) to get a new oxygen load.
Makes sense? lol
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The body's primary source of energy is the nutrients from food and also water but mostly food <span />
D. it is safer because no radiation is used
He could make sure he exercises regularly to keep the blood flow pumping to his heart, he can eat healthy so that he does not have a lot of fat build up in his arteries and he can also stay away from smoking to keep his body functioning properly.
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