The correct answer is "Citizen." A citizen is a legal member of a country who possesses certain rights, privileges, and responsibilities within the nation-state. In order to become a citizen of a country, a person goes through a process called naturalization. Naturalization typically involves meeting specific requirements such as residency, knowledge of the country's language and government, and passing a citizenship test. Once a person successfully goes through the naturalization process, they are considered a citizen of that country. So, the term "citizen" is the correct term for a legal member of a country.
