Which amendment prohibits the denial of voting rights based on gender?

The 19th Amendment is the correct answer as it explicitly prohibits the denial of voting rights on the basis of sex. Ratified in 1920, this amendment granted women the legal right to vote in the United States, ensuring that gender could not be used as a basis for disenfranchisement. It was a significant milestone in the women’s suffrage movement, representing years of effort by activists to secure equal voting rights.

In contrast, the other amendments listed pertain to different aspects of voting rights. For instance, the 15th Amendment prohibits denial of voting rights based on race or color, while the 24th Amendment eliminates poll taxes in federal elections, aiming to combat economic barriers to voting. The 26th Amendment lowers the voting age to 18, thereby addressing age-related voting. Each of these amendments focuses on different criteria for voting eligibility, highlighting the importance of the 19th Amendment in the context of gender and suffrage.