sunlight is a kind of solar energy & photosynthesis means green plants convert from carbon dioxide and water and solar energy into carbohydrates and food and oxygen for themselves ->  photosynthesis means plants convert carbon dioxide and water and sunlight into carbohydrates and food and oxygen  photosynthesis means plants convert carbon dioxide and water and sunlight into carbohydrates and food and oxygen & photosynthesis is a kind of process ->  photosynthesis is a kind of process in which plants convert carbon dioxide and water and sunlight into carbohydrates and food and oxygen  if an organism performs a process that converts something into something else, then that organism requires that something for that process & a plant is a kind of organism ->  if a plant performs a process that converts something into something else, then that plant requires that something for that process  photosynthesis is a kind of process in which plants convert carbon dioxide and water and sunlight into carbohydrates and food and oxygen & if a plant performs a process that converts something into something else, then that plant requires that something for that process ->  a plant requires sunlight for photosynthesis  a plant requires sunlight for photosynthesis & sunlight is a kind of light ->  photosynthesis requires light  photosynthesis requires light & dark means a low amount of light -> darkness has a negative impact on photosynthesis