d) Suggest when most oxygen would be released into the air. e) Suggest when most carbon dioxide would be released into the air during the 24 hours. Suppo your answer with a reason.

**d) Suggest when most oxygen would be released into the air.** Most oxygen is released into the air **during the daytime**, particularly in the **morning and early afternoon**. This is because plants perform photosynthesis when sunlight is available, a process that converts carbon dioxide and water into glucose and oxygen. The presence of light activates the chlorophyll in plant cells, facilitating the release of oxygen as a byproduct. **e) Suggest when most carbon dioxide would be released into the air during the 24 hours. Support your answer with a reason.** Most carbon dioxide is released into the air **during the night**. This occurs because, in the absence of sunlight, plants cease photosynthesis and instead rely solely on respiration to generate energy. During respiration, plants consume oxygen and release carbon dioxide. Without the balancing effect of photosynthesis to absorb carbon dioxide, the net release of carbon dioxide into the atmosphere increases during nighttime hours.