sentences: a producer produces its own food & producer is a kind of role in the food chain process / in an ecosystem ->  producer is a kind of role in the food chain system that produces food  producer is a kind of role in the food chain system that produces food & the role of one type of plankton is to produce food ->  in the food chain process some types of plankton have the role of producer  a producer produces its own food & producer is a kind of role in the food chain process / in an ecosystem ->  producer is a kind of role in the food chain process that produces food  producing something is a kind of method for providing something & green plants provide food for themselves / animals / consumers by performing photosynthesis ->  green plants produce food for themselves / animals / consumers  producer is a kind of role in the food chain process that produces food & green plants produce food for themselves / animals / consumers ->  in the food chain process a green plant has the role of producer  in the food chain process a green plant has the role of producer & seaweed is a kind of plant ->  in the food chain process seaweed has the role of producer  in the food chain process some types of plankton have the role of producer & in the food chain process seaweed has the role of producer ->  in the food chain process some plankton and seaweed both have the role of producer  in the food chain process some plankton and seaweed both have the role of producer & if two things both have a certain role then those two things have the same role -> in the food chain process some plankton and seaweed have the same role