Which amendment grants freedom of speech?

The First Amendment to the United States Constitution is fundamental in establishing the principle of freedom of speech. This amendment explicitly states that Congress shall make no law abridging the freedom of speech, which protects individuals' rights to express their thoughts and ideas without government interference or censorship. The significance of this protection is seen throughout U.S. history, enabling open discourse, debate, and the exchange of ideas, all vital to a democratic society.

In contrast, the Second Amendment deals with the right to bear arms, the Third Amendment addresses the quartering of soldiers, and the Fourth Amendment provides protection against unreasonable searches and seizures. Each of these amendments serves a unique purpose, but it is the First Amendment that specifically safeguards the expression of speech.