Ethnicity is a complex concept that encompasses many aspects of identity. ETHNOLOGICAL refers to the scientific study of human cultures, which includes the study of language, customs, and beliefs. NATIONAL refers to the shared identity of a group of people who share a common language, culture, and history. TRIBAL refers to a group of people who are related by blood or marriage and share a common culture and language. PAGAN refers to a belief system that is not based on any organized religion. CULTURAL refers to the shared beliefs, values, and practices of a particular group of people. RACIAL refers to the physical characteristics of a group of people, such as skin color, hair texture, and facial features. All of these terms are related to ethnicity and help to define it.