Which amendment abolished poll taxes in federal elections?

The Twenty-Fourth Amendment is the correct answer 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 aimed at eliminating discriminatory practices that hindered voter participation, particularly among low-income individuals and minorities.

The poll tax was considered a financial barrier that prevented many eligible voters from exercising their right to vote, thus the amendment was a landmark change ensuring that the right to vote could not be conditioned on one's ability to pay a tax. It aimed to reinforce the principle of universal suffrage, emphasizing that the contribution to democracy should not be limited by economic status.

The other amendments mentioned do not relate to poll taxes or voting restrictions in the context of federal elections. For instance, the Twenty-Seventh Amendment deals with congressional pay increases, the Twenty-Third Amendment pertains to voting rights for residents of Washington D.C. in presidential elections, and the Twenty-Fifth Amendment outlines presidential succession and disability, none of which address the issue of poll taxes.