incidental. Contingent upon or pertaining to something that is more important; that which is necessary, appertaining to, or depending upon another known as the principal.nder Workers' Compensation statutes, a risk is deemed incidental to employment when it is related to whatever a worker must do in order to fulfill the employment contract, but is not the primary function that the worker was hired to do.
A cultivator is both a general term for any tool that is used to prepare soil for planting, and the name of four specific tools: a piece of machinery attached to a tractor, a small engine-propelled machine, a hand-action tool, and a traditional hand-tool.
A decomposer is an organism that breaks down waste and dead organisms into nutrients for the producers. These can be fungi, animals, bacteria, etc... An ecological niche is the role or function the organisms has in its ecosystem. For example, an owl's niche would be that of a hunter in his ecosystem. I hope this helps a bit.