Photosynthesis: The process which is used by organisms and plants to convert light energy to chemical energy. This process, takes in the carbon dioxide which is produced by the organisms and adds oxygen again in the atmosphere.
Sedimentation: This process is used for the treatment of water by using to remove suspended solid particles or unwanted particles from water.
Respiration: The process in which intake of oxygen occurs and release of carbon dioxide takes place.
Evaporation: The process in which liquid state changes into gaseous state.
Hence, according to the definition of respiration, due to this process only carbon dioxide is adds to the atmosphere.
Thus, respiration is the correct answer.
