Which of the following factors is not necessary for photosynthesis?

Wind is not necessary for photosynthesis. Photosynthesis is a process that occurs in plants where they use energy from sunlight to convert carbon dioxide and water into food (glucose). Sunlight provides the energy, water and carbon dioxide are the raw materials, while chlorophyll in the plant absorbs the light and performs the chemical reactions. Wind can help distribute the gases and cool the plant, but it is not necessary for the actual process of photosynthesis to occur.