Option 2 is the correct match. A decomposer, such as bacteria, is an organism that breaks down dead organic material and recycles nutrients back into the ecosystem. They play a vital role in decomposition and nutrient cycling by breaking down complex molecules into simpler forms that can be used by plants and other organisms. Decomposers are crucial for maintaining a healthy ecosystem as they recycle nutrients and help with the decomposition of organic matter.

Alert - correct answer should be 3: Option 3, which matches producer (organism that produces its own food through photosynthesis) with deer, is incorrect. Deer are not producers, as they do not possess the ability to produce their own food through photosynthesis. They are actually herbivores, which are considered primary consumers, since they feed on plants.