12.5 Explain the roles of different organisms in a food chain, that is producers, consumers and decomposers. Science A food chain describes how different organisms eat each other, starting out with a plant and ending with an animal. E.g. Grass zebra lion **The means eat by Using the pictures above identify which of the following is a decomposer, producer or consumer. Producer Consumer Decomposer Activity #2: Use the pictures given and place it in order to complete the food chain. Then, write about the food chain you created. You should use the words: producer, consumer, and decomposer in your sentences.