What is the ecological term for a group of organisms that interacts with each other?

The ecological term for a group of organisms that interacts with each other is described as a population. A population consists of individuals of the same species that live in a specific area and can interbreed. This concept emphasizes the interactions among members of that species, such as competition, mating, and cooperation.

Ecosystem refers to a broader concept that encompasses not only the interactions among organisms of various populations but also their interactions with the physical environment, including abiotic factors like soil, water, and climate.

Fauna specifically refers to the animal life of a particular region or period, while kingdom is a higher taxonomic rank in biological classification that groups organisms with shared characteristics across diverse species, rather than focusing on their interactions.

Thus, when identifying the term that specifically denotes a group of interacting organisms, population is the most appropriate choice.