Ethnicity is a complex concept that refers to a person’s identification with a specific group of people , based on shared traits, including ancestry, culture, language, religion, customs, and nationhood. In sociology, ethnicity is defined as a shared culture and way of life, including history, language, religion, and culture. Ethnicity refers to the Cultural Differences & identification of people of different geographic regions , including their customs, history, language & religion. So basically, race describes physical traits while ethnicity refers to cultural identification.