Question

check all the ways that carbon dioxide is added to the atmosphere. photosynthesis respiration combustion decomposition diffusion

Explanation:

Respiration is when living organisms release carbon - dioxide. Combustion of fuels releases carbon - dioxide. Decomposition of organic matter also releases carbon - dioxide. Photosynthesis takes in carbon - dioxide, not adds it. Diffusion is a general process of movement of substances and is not a major way of adding carbon - dioxide to the atmosphere in the context of this question.

Answer:

B. Respiration, C. Combustion, D. Decomposition