[{"hint": "Start with a plant (producer) and build up.", "answer": null, "question": "Create a food chain with at least four organisms. Label each as producer, primary consumer, secondary consumer, or top predator."}, {"hint": "Think about what decomposers do with dead material and nutrients.", "answer": "Dead material would pile up and nutrients would not be recycled back into the soil, eventually starving producers.", "question": "What would happen to an ecosystem if all decomposers disappeared?"}]