Which amendment provides for women's suffrage?

The Nineteenth Amendment to the United States Constitution specifically guarantees women the right to vote, thus directly addressing the issue of women's suffrage. Ratified in 1920, this amendment states that the right to vote shall not be denied on the basis of sex. This landmark legislation was the culminating achievement of the women’s suffrage movement, which fought for decades to ensure that women had an equal voice in the electoral process.

The other amendments listed do not pertain to women's suffrage. The Fifteenth Amendment focuses on prohibiting the denial of the right to vote based on race or color, the Twenty-fourth Amendment prohibits poll taxes in federal elections, and the Twenty-sixth Amendment lowers the voting age to eighteen. Each of these amendments addresses different aspects of voting rights but does not specifically establish or guarantee women's suffrage.