It's B because there are less mood elevating chemicals in people who aren't active. Which is why people with depression are told to try and be more active
Answer:
Gases exchanged in the lungs are carried by the blood.
Explanation:
C. Ross's fitness level will diminish from what it was two months ago.
The lungs are an important part of the respiratory system,lungs allow you to breathe. The lungs are part of the respiratory system and they include airways that carry air in and out of your lungs, blood vessels surrounding the lungs, and the muscles that help you breathe.
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