Which environmental factor is crucial for photosynthesis?

The crucial environmental factor for photosynthesis is light intensity. Photosynthesis is the process by which plants convert light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen. Light is essential because it provides the energy required for the chlorophyll in plant cells to facilitate the conversion of carbon dioxide and water into sugars.

Without sufficient light intensity, the rate of photosynthesis will decline, leading to reduced plant growth and vitality. While temperature, water availability, and soil pH are also important factors that can affect plant health and photosynthesis indirectly, they do not play a direct role in providing the energy needed for the process itself. Therefore, light intensity stands out as the most critical factor directly influencing photosynthesis.