Answer:
The carbon cycle
Step-by-step explanation:
Carbon is an important element in our world. The carbon moves through earth's ecosystems by the carbon cycle:
Carbon dioxide is taken from the atmosphere by plants (or other photosynthetic organisms like alge), these organism use the CO2 to make organic molecules, which travel through different organisms by food chain. The autotrophs and heterotrophs break sugars and the carbon atoms are released i respiration in CO2 form.