Answer: Option D
Step-by-step explanation:
Photosynthesis is the process by which producers trap sunlight and makes food by the help some compounds such as carbon dioxide and water. It takes place only during the day as sunlight is available at the daytime only.
Cellular respiration is the process that takes place to get energy from the food that is present in the plant body. It requires oxygen and it can take place during the day time as well as night time.