What is the similarity of nation nationality and ethnic group?

Nation, nationality, and ethnic group all relate to the concept of identity and community. A nation typically refers to a large group of people who share a common government, territory, and often a common culture or language. Nationality is the legal relationship between an individual and a state, often signifying citizenship. An ethnic group, on the other hand, is defined by shared cultural traits, ancestry, and historical experiences, which may or may not align with national boundaries.