Which of the following is a right only for United States citizens?

The right to vote in federal elections is unique to United States citizens and is enshrined in the Constitution. This right is fundamental to the democracy of the nation, allowing citizens to participate in the electoral process and influence government decision-making through their votes.

While lawful permanent residents (green card holders) do have the right to work in a variety of jobs (which corresponds to the first option), the ability to engage in the political process by voting is reserved specifically for citizens. Similarly, public assistance programs may be accessible to some non-citizens, depending on state laws and specific program eligibility rules. Free healthcare is not universally guaranteed, and while citizens may have access to government health programs, this is not exclusive to them.

The significance of the voting right underscores the importance of citizenship in participating fully in the civic responsibilities and privileges of living in the United States.