When the majority of people are united by a common ethnicity, language, and culture, this is known as a(n)

When the majority of people are united by a common ethnicity, language, and culture, this is known as a nation.
A nation is a large group of people who are connected through these common characteristics they all share. Even though they may not be living in the same country, they are still originally part of the same nation. Thus nation-state, embassy, and country are incorrect answers.

Ithink it is something and something