Which of these rights is guaranteed to every U.S. citizen?

The right to freedom of speech is guaranteed to every U.S. citizen under the First Amendment of the United States Constitution. This amendment protects individuals' rights to express their thoughts, opinions, and beliefs without government interference, making it a fundamental aspect of American democracy. This right is essential for enabling open dialogue, debate, and the exchange of ideas in a free society.

While the right to bear arms is protected by the Second Amendment, it is subject to various regulations and interpretations, and it may not be considered a universal right for all citizens in the same way as freedom of speech. The right to vote at 16 is not guaranteed; the legal voting age in federal, state, and local elections is 18. The right to public education is significant and generally provided to all children, but the specifics of this right can vary by state and do not have the same constitutional protection as freedom of speech. Therefore, freedom of speech stands out as a universal right guaranteed to every U.S. citizen.