What constitutes an ecological unit composed of different species interacting with each other?

A community is defined as an ecological unit comprised of different species that coexist and interact within a specific area. These interactions can include various forms of relationships such as predation, competition, mutualism, and parasitism. Communities are characterized by the diversity of species that inhabit an area and their dynamic interactions, which influence the structure and function of the ecosystem.

In contrast, a biome refers to a larger geographical area with distinct climate, flora, and fauna, but it encompasses multiple communities. A population is a group of individuals of the same species living in a specific area, which does not include interactions with different species. An ecosystem includes both the community of living organisms and their physical environment, focusing on the flow of energy and the cycling of nutrients, but it is broader than just the interactions among different species. Hence, the community is the most precise term for a unit of various species interacting with one another.