The correct answer is A. Sunlight
Step-by-step explanation
Photosynthesis is the process by which autotroph organisms such as plants create their energy and can grow or develop. This process is done through the leaves, which function as nutrient input routes to the plant, where chlorophyll is stored that is the substance that transforms the sun's rays into energy for the plant. Also, the plant absorbs water through the roots that is another input in photosynthesis. In this way, in photosynthesis, the basic inputs include sunlight, water, and carbon dioxide, while the outputs are energy in the form of glucose and oxygen. So, the correct answer is A. Sunlight