Which responsibility is only for United States citizens?

Serving on a jury is a responsibility that is specifically reserved for United States citizens. This duty is a fundamental aspect of the justice system, ensuring that individuals are tried by a jury of their peers—people who share the same civic status and legal rights as the defendants. It emphasizes the importance of civic engagement and participation in the judicial process, which helps maintain the integrity of the legal system.

While defending the country, voting in elections, and paying taxes are important responsibilities of citizenship, they can also involve legal obligations for non-citizens in certain contexts, such as taxes or specific roles in national defense during wartime for lawful residents. However, jury duty is exclusively tied to citizenship and is a clear manifestation of one's full legal status within the United States.