What is one responsibility that is only for United States citizens?

One responsibility that is specifically reserved for United States citizens is serving on a jury. This civic duty is a fundamental aspect of the American legal system, ensuring that individuals are tried by a group of their peers. Only citizens are called to fulfill this role because it involves making judgments on legal matters that can significantly affect the lives of individuals and the community at large.

Serving on a jury reflects the principle of participatory governance where citizens have a direct role in the judicial process. This responsibility underscores the idea that civic participation is crucial in maintaining a fair and just legal system, which relies on the active involvement of the people to uphold their rights and those of others.

In contrast, while voting in elections is also reserved for citizens, it is not an obligation but a right. Paying taxes is a responsibility that extends to all residents, including non-citizens, and defending the country, while important, can also include duties performed by lawful permanent residents and others, providing a broader context beyond just citizenship.