The atmosphere gains carbon dioxide through the following ways except

The atmosphere gains carbon dioxide through various natural and human activities, but one of the options listed is incorrect. Carbon dioxide is taken up by plants during photosynthesis, released into the atmosphere through respiration by plants and animals, and through the death and decay of plants and animals. Additionally, human activities such as burning fossil fuels like coal and wood for energy also release carbon dioxide into the atmosphere. Therefore, the option that is incorrect is "photosynthesis in plants" since photosynthesis actually removes carbon dioxide from the atmosphere rather than adding it.