What is one right guaranteed by the 1st Amendment?

The First Amendment to the United States Constitution is foundational in protecting several essential rights related to personal freedoms and expression. Among these rights is the freedom of assembly, which allows individuals to gather peacefully for various purposes, such as protests, demonstrations, or social gatherings. This right ensures that citizens can express their collective views, advocate for change, and assemble without fear of government interference, as long as they do so peacefully.

In the context of this question, freedom of assembly directly connects to the First Amendment's emphasis on not only free speech but also the right to come together with others to express thoughts and beliefs. This is crucial for a functioning democracy, where citizens can engage with each other and the government.

The other choices relate to rights protected by different amendments or legal principles. The right to bear arms is protected by the Second Amendment, the right to a fair trial is outlined in the Sixth Amendment, and protection from unreasonable searches is found in the Fourth Amendment. Each of these aspects of rights is essential, but only freedom of assembly is directly associated with the First Amendment, making it the correct answer in this context.