An organism's role in an ecosystem is called its

An organism's role in an ecosystem is called its

• A. Habitat
• B. Population
• C. Niche
• D. Symbiosis

Answer: (C)

An organism’s niche is its ecological role—the job it does in the community: what resources it uses, how it obtains energy, how it interacts with other species, and how it influences the environment. This goes beyond just where it lives. Habitat is the physical place, not the function, and population is how many individuals there are of that species. Symbiosis describes specific types of interactions between species, not the overall role of the organism. So the term that best fits is niche, which captures the organism’s place and function in the ecosystem. For example, a beaver’s niche includes building dams and altering the environment to create wetlands, while its habitat is the rivers and streams it occupies.

An organism’s niche is its ecological role—the job it does in the community: what resources it uses, how it obtains energy, how it interacts with other species, and how it influences the environment. This goes beyond just where it lives. Habitat is the physical place, not the function, and population is how many individuals there are of that species. Symbiosis describes specific types of interactions between species, not the overall role of the organism. So the term that best fits is niche, which captures the organism’s place and function in the ecosystem. For example, a beaver’s niche includes building dams and altering the environment to create wetlands, while its habitat is the rivers and streams it occupies.