The main function of the human digestive system is to a. Rid the body of cellular waste materials
b. Process otrganic molecules so they can enter cells
c. Break down glucose in order to release energy
d. Change amino acids into proteins and carbohydrates

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B

Explanation:

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.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely