Concept:Ecology is studied at different levels: autecology examines a single species, while synecology examines whole communities of species in an area.
Explanation:The question describes the study of inter-relationships between groups of organisms or species living together in one area.
This is the definition of synecology, which focuses on communities and their interactions.
Autecology studies a single organism or species, not groups of species.
Ecological niche describes the role of a species in its habitat, not the study of relationships.
Ecosphere refers to the global sum of all ecosystems, not a branch of study.
Therefore, synecology is the correct term for the given description.
Answer:C. Synecology