The sociological term for a group of people distinguished by others or by themselves, primarily on the basis of cultural characteristics or national origin, is

Ethnic group, is the right answer.

Explanation:

The term ethnic group is used to describe those who share a similar lineage or ancestry or common history, language, nation or culture. A similar term Ethnicity is also used to describe the same concept. In the cases of ethnic nationalism, Ethnicity is the term which is used more frequently.

Ethnic groups generally share the same gene pool and speak related languages. Such ethnic groups are distinguished from others or by themselves principally by based on cultural characteristics or national origin.

answer; community based corrections;

answer; majority;