Answer: Photosynthesis is not a way carbon dioxide returns to the atmosphere.
Step-by-step explanation: Photosynthesis is a process in which plants release oxygen as a by-product, and on the contrary, it intakes carbon dioxide. During photosynthesis, plants need carbon dioxide to make their meal, and they give off oxygen as the by-product.
In green plants, light energy from the sun is trapped by the chlorophylls in the chloroplast and used to convert water and carbon dioxide into oxygen and energy.