8. Which definition below BEST describes the term Niche? An organism's role within its environment An environment in which an organism lives and receives all of its'basic needs. The level in which an organism resides within the food chain.

The best definition of a niche is **an organism's role within its environment.** This includes what it eats, what eats it, its interactions with other organisms, and how it utilizes resources in its environment. The other options are related but not as comprehensive. A habitat is where an organism lives, and its trophic level describes its position in the food chain, but the niche encompasses much more than just those aspects.<br />