I don’t know the answer but i just need an explanation or evidence why the answer is correct

Answer:
CO2 will rise from both animal and plant respiration
Explanation:
In the presence of sunlight or any provider of such light source, plants will carry ouy photosynthesis. In the absence, plants now carry about respiration llike animals taking in 02 and produce CO2. Animals carry out respiration regardless of sunlight/light source.