The correct answer is: A. Light energy is converted into chemical energy.
Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into oxygen and glucose. The light energy is absorbed by chlorophyll, a green pigment found in plant cells. The chlorophyll uses the light energy to split water molecules into hydrogen ions and oxygen gas. The hydrogen ions are then combined with carbon dioxide to form glucose, a sugar molecule. The oxygen gas is released into the atmosphere.
Option B is incorrect because chemical energy is not converted into light energy in photosynthesis. The light energy is used to convert carbon dioxide and water into glucose.
Option C is incorrect because chemical energy is not converted into electrical energy in photosynthesis. The light energy is used to convert carbon dioxide and water into glucose.
Option D is incorrect because light energy is not converted into mechanical energy in photosynthesis. The light energy is used to convert carbon dioxide and water into glucose.