Name one responsibility that is exclusively for U.S. citizens.

The responsibility that is exclusively for U.S. citizens is serving on a jury. This civic duty is grounded in the legal system of the United States, which guarantees the right to a fair trial by jury. Only citizens can serve as jurors because they possess a deeper understanding of the laws and values that govern the country. This requirement ensures that those making significant legal decisions regarding the rights and responsibilities of individuals within the society share a commitment to the principles of justice and democracy inherent in citizenship.

While paying taxes and voting in elections are crucial responsibilities for U.S. citizens, they do not uniquely belong to citizens, as certain non-citizens may also face tax obligations based on their income and residency in the U.S. Voting is typically reserved for citizens, but it is essential to note that not all forms of elections or referenda allow for participation by all citizens, and some local measures may allow non-citizen participation.

Thus, serving on a jury stands out as the clear responsibility that can only be undertaken by citizens, reflecting a fundamental aspect of civic engagement and maintaining the integrity of the judicial system.