carbohydrates are made of sugars & photosynthesis makes food for the plant by converting carbon dioxide, water, and sunlight into carbohydrates ->  photosynthesis converts sunlight into sugar  photosynthesis converts sunlight into sugar & sunlight is a kind of solar energy ->  photosynthesis converts solar energy into sugar  photosynthesis converts solar energy into sugar & a leaf performs photosynthesis -> a leaf converts solar energy into sugar