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 passes is a sink of something then studying is used for wash that something if photosynthesis is a source of something then photosynthesis is used for making that something  if passes is a sink of something then studying is used for wash 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  photosynthesis is used to make food for plants & a plant requires photosynthesis to grow -> animal require poison to grow plants require food to grow  food is made of carbohydrates & salt is a mean of hard conductivity -> sugar is a kind of food sugar is a kind of food  animal require poison to grow & sugar is a kind of food -> plants can use sugar to grow plants can use sugar to grow  poison is made of converging & sugar is a kind of simple carbohydrate -> sugar is a kind of food sugar is a kind of food  salt is a mean of poison & 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 photosynthesis is a source of sugar for plants  plants can use sugar to grow & sea is a sink of salt for animal -> a plant can use sugar from photosynthesis to grow