Carbon can enter environment through various ways. It can be respiration, combustion and decomposition. The process of photosynthesis does not release carbon to the environment.
What is photosynthesis?
The process by which plants produces their own food i.e., glucose in presence of sunlight and chlorophyll, using carbon dioxide and water. Its equation can be written as
[tex]6CO_{2} +6H_{2} O\frac{Sunlight}{Chlorophyll} > C_{6} H_{12}O_{6}+6O_{2}[/tex]
Thus, it can be concluded as among the given options, photosynthesis is the process that do not release carbon in environment.
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