Please choose the correct answer to the question: An ecosystem is a community of organisms interacting with their physical environment. Why are decomposers an important part of ecosystems?

Answer1: They break down dead organisms to return nutrients to the soil. Answer2: They produce their own food for survival. Answer3: They play a role in preventing weathering and erosion. Answer4: They provide most of the energy to consumers.

Answer format: answer1/answer2/answer3/answer4