Atoms of carbon are: (a) constantly being created.
(b) constantly being destroyed.
(c) continuously recycled.
(d) transported to Earth by the sun’s rays.

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.