Pedro is a PhD student performing a research on aerobic organisms. He has to understand how aerobic organisms survive under water .Which topic should Pedro read up on to understand this phenomenon?

i believe the correct answer is d

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

d we did this already