Which of the following does not add carbon dioxide to the atmosphere?
(Cellular) Respiration
Combustion
Decomposition
Photosynthesis

Necessarily, Decomposition doesn't need it, because instead, it releases it, so the one that doesn't need Carbon Dioxide, is Decomposition.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.