What describes a group of interdependent organisms inhabiting the same region and interacting with each other?

A group of interdependent organisms inhabiting the same region and interacting with each other is best described as a community. In ecological terms, a community includes all the different species that live in a particular area and interact with one another, forming relationships such as predation, competition, and symbiosis.

The interactions among these organisms can influence their survival and reproductive success, making the idea of interdependence critical. For example, in a forest community, trees, birds, insects, and fungi all play specific roles and contribute to the ecosystem's overall health.

The other terms specify broader or different concepts: an ecosystem encompasses both the living organisms and the physical environment they interact with, including abiotic factors; a biosphere refers to the global sum of all ecosystems and the zones of life on Earth; and a population pertains specifically to members of the same species living in a given area. Thus, community is the most precise descriptor for a group of interdependent organisms interacting with one another in a shared habitat.