Which of the following is a major event in plants during day time?

Correct option is C

The correct answer is (C)   $$O_2$$ release

• ​During the day, plants perform photosynthesis, a process where they use sunlight to create food. In this process, plants take in carbon dioxide from the air and water from the soil to produce oxygen and sugar.
• The oxygen is released into the air.

Information booster:

Photosynthesis

• Photosynthesis only happens during the daytime when sunlight is available.
  
• Plants also respire continuously, both day and night. Respiration involves the intake of oxygen and the release of carbon dioxide.
• During the day, both photosynthesis and respiration occur, meaning oxygen and carbon dioxide are exchanged through the leaves.
• At night, photosynthesis stops due to the absence of sunlight, and only respiration takes place. This causes oxygen to enter the leaves and carbon dioxide to leave.
• Photosynthesis primarily occurs in the green parts of the plant, where chlorophyll, water, and carbon dioxide interact in the presence of sunlight to produce glucose and release oxygen.​