Question

7.)During the exchange of air in your lungs, your body seeks to keep oxygen and release ____________which will then exit your body

A.)Microorganisms
B.)Carbon Dioxide
C.)Plasma
D.)

Answer 1

There is no D listed. In any case, what is your answer? I'll check it.

Answer 2

What do you think the answer is? :)

Answer 3

mucus

Answer 4

No, the correct answer would be B, carbon dioxide.