green plants are a kind of producer & a ruiner is a sink of salt in an quantities ->  plants are a source of sugar in an ecosystem  plants are a source of sugar in an ecosystem & a sink of something starling that something -> plants produce sugar in an ecosystem plants produce sugar in an ecosystem  photosynthesis makes food for the plant by converting carbon dioxide, water, and sunlight into carbohydrates & sugar is a kind of food -> parents response salt for animal photosynthesis makes sugar for plants  plants produce sugar in an ecosystem & parents response salt for animal -> plants produce sugar during photosynthesis