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

Serving in the military is a responsibility that is exclusively designated for United States citizens. This duty typically comes into play during times of war or national emergency, where citizens can be required to enlist or respond to a military draft. This differentiates it from other responsibilities, such as obeying the law or paying taxes, which apply to all individuals living in the country, regardless of their citizenship status. Attending school is also a requirement that applies to children of all residents, not just citizens. The unique nature of military service as a civic responsibility underscores the connection between citizenship and the obligation to contribute to national defense.