Answer;
A. The first stage, which includes the light-dependent reactions.
Step-by-step explanation;
-Photosynthesis, process by which green plants and certain other organisms use the energy of light to convert carbon dioxide and water into the simple sugar glucose. The process takes place in two stages; light-independent and light-dependent reactions.
-The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH.