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
Good Luck! :)
Typical fears for children are being afraid of the dark. Oh and halloween masks.
B. predicting what friends will think
Answer:
Bad sanitation makes one susceptible to diseases, and hunger and lack of clean water makes one even more vulnerable to diseases.
Explanation:
