sentences: photosynthesis is a source of / makes food / energy for the plant by converting carbon dioxide, water, and sunlight into carbohydrates
docs: photosynthesis is process. general_photosynthesis is physiological_function. sunlight is energy. photosynthesis is photo_chemical_process. general_photosynthesis is biological_energy_transfer. photosynthesis_in_plants is physiological_process. photosynthesis is chemical_process. glucose is plant_product. general_photosynthesis is production. photosynthesis is process_by_which_leaf_makes_food.