Answer:
d. atmosphere, biosphere, and geosphere
Explanation:
Carbon is one of the most common elements on the planet, with large reservoirs in the biosphere, atmosphere, geosphere and hydrosphere in the form of carbohydrates, proteins, nucleic acids, carbon dioxide and calcium carbonate. Events such as plant cultivation, wood burning and decomposition of living matter prove that carbon is in the above mentioned environments simultaneously as these events are the result of adding to the carbon removal from these environments.
With its strong influence on the interaction between molecules, the carbon cycle is a fundamental process for maintaining life on earth. Responsible for photosynthesis and keeping the planet warm through the greenhouse effect, without it we would not be here.
