Which term describes an organism's role in its ecosystem?

The term that describes an organism's role in its ecosystem is "niche." A niche encompasses several aspects of an organism's life, including its habitat (the environment in which it lives), its behavior, its interactions with other organisms, and its role in the flow of energy and nutrients within the ecosystem. In essence, a niche defines how an organism fits into its community, what resources it utilizes, and how it responds to environmental changes.

In contrast, "habitat" refers specifically to the physical environment where an organism lives, rather than its functional role. "Community" describes a group of different species living and interacting in the same area, while "biome" refers to large geographic areas with distinct climates and ecosystems, such as deserts or forests. Therefore, "niche" accurately reflects the functional role of an organism within its ecosystem.