Respuesta :
Correct answer: A). Decomposition
Decomposers are the organisms that are known to break down the dead and decayed animals and plants, and the process is known as decomposition. They are also known to help in the breakdown of a waste of other organism.
They are considered important for the ecosystem, as if they were not there in the ecosystem then the plant would not be able to get essential nutrients that are necessary for their growth. Because it is the decomposers who help in the recycling of carbon and the nitrogen cycle.
Example: bacteria, fungi