Which amendment abolished poll taxes in federal elections?

The Twenty-fourth Amendment abolished poll taxes in federal elections. Ratified in 1964, this amendment was implemented to eliminate economic barriers that disproportionately affected voters from low-income backgrounds, particularly African Americans and other marginalized groups, thereby enhancing their ability to participate in the electoral process. Prior to its passage, poll taxes were used in several states as a means to restrict access to voting, effectively disenfranchising certain populations. The amendment's significance lies in its commitment to ensuring that voting rights cannot be conditioned on the payment of a tax, thus promoting greater electoral equity and inclusion.

The other choices pertain to different aspects of electoral processes or presidential succession, and hence do not address the issue of poll taxes directly. This demonstrates the critical focus of the Twenty-fourth Amendment on protecting the right to vote and making it accessible to all citizens without financial burdens.