The Decomposers which decompose the organic matter from dead plants and animals occupy the last trophic level or the top of the ecological pyramid, the most common examples of decomposers are microorganisms like bacteria, and fungi.
For example, plants that can make their food through the process of photosynthesis are called producers, consumers are of three types herbivores carnivores, omnivores based on their consumption, and decomposers are classified by the type of organic matter they break down.
Scavengers, Detritivores, Saprotrophs.