Answer: "How might different types of organisms--producers, consumers, decomposers--be important to a healthy ecosystem?" (Producers change energy into matter with chemical energy that other organisms can use and then consumers pass the matter and energy on to other organisms by eating and being eaten; decomposers recycle some of the energy and the matter back into the system.) for primary consumers- The ecosystem wouldn't work very well, and not all organisms would be able to get their needs for energy met.)
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