What is a Niche?

• A. An organism's specific role in an ecosystem.
• B. The physical location where an organism lives.
• C. A non-living component of the environment.
• D. A type of climate zone.

Answer: (A)

The idea being tested is that a niche is the organism’s specific role in an ecosystem—the function it serves and how it relies on resources to survive and reproduce. This includes what it eats, how it obtains food, how it interacts with other species (such as predators, prey, and competitors), when it’s active, and how it affects its environment. It’s about the organism’s job and its relationships within the community, not just where it lives. That’s why the correct choice is that an organism’s niche is its specific role in an ecosystem. The physical location where it lives describes habitat, the non-living components of the environment describe abiotic factors, and a climate zone describes the broader climate context.