Please choose the correct answer to the question: Rolanda is growing tomato plants in her garden. She has created a compost pile and has been adding compost around her tomato plants to help fertilize them. Compost is solid waste in which organic material is broken down by microorganisms in the presence of oxygen to where it can be safely stored, handled, and applied to the environment. On what does Rolanda primarily rely in order for composting to work?

Answer1: producers Answer2: consumers Answer3: scavengers Answer4: decomposers

Answer format: answer1/answer2/answer3/answer4
Answer: answer4