Answer:
b permeated diffusion ...........
A, c, and d are the answers
It’s not b because trees release oxygen and absorb carbon dioxide
Answer:
i think the answer would be that everything else will change and adapt differently because something is missing.
Answer:
I think its A
Explanation:
Because the reason why airplane have closed windows is because we can't breathe in carbon dioxide when we go up. Of course there is oxygen just not a lot as we go up. Why would there be helium in the air? We would sound weird when we skydive.
