Plants get the carbon dioxide they need from the air through their leaves. It moves by diffusion through small holes in the underside of the leaf called stomata. These let carbon dioxide reach the other cells in the leaf, and also let the oxygen produced in photosynthesis leave the leaf easily.
Answer:
as people use more and more fossil fuels for their purposes they are not distributed evenly
Absorbing other cells gave a competitive advantage.
Hope this helps!<span />
The answer is c when the substances are evenly spread out.
