Question

an organism’s niche is determined by its
\boxed{quad}, which is it’s physical environment.
done ✔️

Explanation:

In ecology, an organism's niche is related to its habitat, which is the physical environment where it lives. The term that fits here is "habitat" as it refers to the physical surroundings (like climate, resources, etc.) of an organism, and the niche is influenced by this physical environment.

Answer:

habitat