What is one responsibility of only U.S. citizens?

Serving on a jury is a responsibility that is exclusive to U.S. citizens. This duty is rooted in the legal and constitutional framework of the United States, where juries are formed to ensure a fair trial by one's peers, a right guaranteed by the Sixth Amendment. Only citizens can fulfill this role because they are considered to have a vested interest in the community and its laws, contributing to the principle of civic engagement and accountability in the judicial process.

The other options do not have the same restriction to U.S. citizens. For instance, paying taxes is a responsibility that applies to all residents, regardless of citizenship status, as long as they earn income within the country. Attending public meetings and petitioning the government are rights afforded to all individuals in the U.S., including non-citizens, as part of their freedom of speech and assembly. Hence, the requirement to serve on a jury distinctly marks the unique civic responsibility set aside for citizens.