Task: Question Answering
Input (English): An ecosystem is a community of organisms interacting with their physical environment. Why are decomposers an important part of ecosystems?  
 (A) They break down dead organisms to return nutrients to the soil. (B) They produce their own food for survival. (C) They play a role in preventing weathering and erosion. (D) They provide most of the energy to consumers.
Output (English): A