Answer:
D
Step-by-step explanation:
The only process in the model that takes carbon dioxide out of the atmosphere is process D.
Process D is otherwise known as photosynthesis and it is peculiar only to green plants and blue-green algae.
During this process, the atmospheric carbon dioxide combines with another inorganic substance (water) in the presence of sunlight energy to produce carbohydrates (glucose). Oxygen is released as the by-product of the process and the equation is as below:
