A community is a social system with spatial and temporal aspects that involves relationships between individuals. It includes people, shared culture, and interdependence. A community is defined as a concentration of individuals in a physical location that share characteristics, customs, and work to meet common needs. Researchers study communities using different theoretical approaches including viewing the community as a place to live (qualitative), a spatial unit (ecological), a way of life (ethnological), or an arena for social interaction (sociological).