if a process is a source of something then that process is used for making that something & photosynthesis is a kind of chemical process ->  if photosynthesis is a source of something then photosynthesis is used for making that something  if photosynthesis is a source of something then photosynthesis is used for making that something & photosynthesis is a source of food for the plant by converting carbon dioxide, water, and sunlight into carbohydrates ->  photosynthesis is used to make food for plants  photosynthesis is used to make food for plants & a plant requires photosynthesis to grow ->  plants require food to grow  food is made of carbohydrates & sugar is a kind of simple carbohydrate ->  sugar is a kind of food  plants require food to grow & sugar is a kind of food ->  plants can use sugar to grow  food is made of carbohydrates & sugar is a kind of simple carbohydrate ->  sugar is a kind of food  sugar is a kind of food & photosynthesis is a source of food for the plant by converting carbon dioxide, water, and sunlight into carbohydrates ->  photosynthesis is a source of sugar for plants  plants can use sugar to grow & photosynthesis is a source of sugar for plants -> a plant can use sugar from photosynthesis to grow