What is defined as a group of organisms of the same species that populate a given area?

A group of organisms of the same species that populate a given area is defined as a population. In biology, a population refers to all individuals of a particular species that live in a specific geographic area and have the potential to interbreed. This concept is fundamental in ecology and evolutionary biology, as it allows for the study of species interactions, genetic variation, and changes in species over time within a defined space.

In contrast, a community encompasses all the different populations of various species that coexist in a specific area, while an ecosystem includes both the biological communities and the physical environment they interact with. The biosphere is the highest level of organization and includes all ecosystems across the planet. Therefore, a population is specifically focused on members of one species within an area, making it the correct definition in this context.