The correct answer you are looking for is A.) Resilience
they are both apart of the nervous system
Direct contact with bacteria and viruses is when you get something like the flu or a something else that's why it's important to wash your hands. I hope my answer helped bye and have a good day.
During inhalation, the lungs expand with air and oxygen diffuses across the lung's surface all of this will enter the blood stream and exhaling isbreathing it all back out
