What is the main source of energy for photosynthesis?

The main source of energy for photosynthesis is sunlight. During this process, plants, algae, and some bacteria absorb light energy, typically through pigments like chlorophyll, which is predominantly found in the leaves of plants. This absorbed light energy is then used to convert carbon dioxide and water into glucose and oxygen.

Sunlight provides the necessary energy to drive the chemical reactions involved in photosynthesis. The light energy is captured and transformed into chemical energy in the form of glucose, which not only fuels the plant's growth but also serves as an energy source for other organisms through the food chain.

While elements like water and nutrients from the soil play essential roles in the photosynthetic process, they do not serve as the energy source; rather, they are materials consumed in the process. Wind does not contribute to energy for photosynthesis. Thus, the correct answer highlights the pivotal role that sunlight plays in supporting life on Earth through photosynthesis.