Which amendment prohibits poll taxes in federal elections?

The Twenty-fourth Amendment is significant because it explicitly prohibits the imposition of poll taxes in federal elections. Ratified in 1964, this amendment was a response to the discriminatory practice of requiring individuals to pay a tax to vote, which disproportionately affected low-income and minority voters. By abolishing poll taxes, the amendment aimed to enhance voting accessibility and eliminate a financial barrier that could prevent citizens from exercising their right to vote.

The Twenty-second Amendment, on the other hand, deals with presidential term limits, while the First Amendment addresses freedoms such as speech, religion, and assembly. The Fifteenth Amendment focuses on prohibiting the denial of the right to vote based on race, but does not specifically address the issue of poll taxes. Thus, the Twenty-fourth Amendment uniquely targets the practice of poll taxes in the context of federal elections, making it the correct answer.