The presence or absence of a. cells
b. atoms
c. molecules
provide evidence that a specimen is a living thing.

I know it

Explanation:

cells because an humane body is made up of cells

answer; ///i believe the answer is (antioxidant);

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.