Ethnicity is like your culture. Language, race, and religion all play into your background and culture. However, politics are something that govern the country you live in -- they're not necessarily connected to your background. Therefore, politics would be the correct answer.
Explanation: ⇒ Politics is not a characteristic of ethnicity. People belong to many different groups with differing cultural practices. Ethnicity refers to a person's membership in a particular group with a shared cultural background. Although individuals vary, people of the same ethnic group may share many things in common:
Heritage or cultural traditions passed from generation.