B. the negative peer pressure is making her do things she wouldn't usually do which is damaging not only her friendships but also her body system
Answer: carbon dioxide
Explanation:
This question is referring to the function of the respiratory system in the body and the lungs with the respiratory system are allowing us to breathe.
The lungs are bringing at first oxygen into our body and that process is called inspiration or also inhalation. They are sending carbon dioxide out which is a process that is called exhalation or also expiration.
This is the exchange that is happening in our body and with that exchange of oxygen and carbon dioxide, it is called respiration.
The “Gut” is referring to the stomach and other organs inside you body. Hope this helps man