Which of the following is NOT a right of United States citizens?

The right to serve in government is indeed a significant aspect of civic engagement, but it is not exclusively a right reserved only for United States citizens. Many offices and positions, particularly at local and even some state levels, may allow non-citizens to participate in certain capacities. While citizenship does typically enable individuals to hold positions in government at federal and many state levels, the fundamental rights associated with citizenship mainly focus on legal protections and freedoms.

In contrast, the rights mentioned in the other options—freedom of speech, freedom of assembly, and the right to trial by jury—are specifically enshrined in the U.S. Constitution and are guaranteed to all citizens. These rights are essential to the functioning of a democratic society, ensuring that individuals can express their opinions, gather peacefully, and receive fair legal representation in court, reflecting the core values of democracy and individual freedoms established in the United States.