Which amendment prohibits the requirement to pay a tax to vote?

The 24th Amendment is the correct choice because it specifically prohibits the imposition of poll taxes in federal elections. Ratified in 1964, this amendment was a significant step in the civil rights movement, aiming to remove financial barriers that prevented low-income citizens, particularly African Americans, from exercising their right to vote. By eliminating poll taxes, the amendment helped ensure that voting rights were not contingent upon an individual's financial status, reinforcing the fundamental principle that the right to vote should be accessible to all citizens without discrimination due to economic hardship.

The other amendments, while important in their own contexts, do not address the issue of poll taxes. The 15th Amendment focuses on prohibiting the denial of the right to vote based on race, the 19th Amendment grants women the right to vote, and the 26th Amendment lowers the voting age to 18. None of these amendments deal with voting prerequisites like poll taxes, making the 24th Amendment the definitive answer to the question.