Which amendment gave women the right to vote?

The 19th Amendment, ratified in 1920, is the constitutional amendment that granted women the right to vote in the United States. This pivotal change arose after decades of advocacy and activism by women's suffrage movements that fought for gender equality in voting rights. The amendment states that the right to vote shall not be denied or abridged on account of sex, explicitly prohibiting discrimination based on gender in the electoral process. As a result, this marked a significant milestone in American history, leading to greater political participation and representation for women.

In contrast, the 15th Amendment, ratified in 1870, addresses voting rights regardless of race, color, or previous condition of servitude, but it does not include gender. The 21st Amendment, ratified in 1933, repealed Prohibition but is unrelated to voting rights. The 24th Amendment, ratified in 1964, prohibits poll taxes in federal elections, which is also not specifically about women's suffrage. Thus, the 19th Amendment is the most relevant and correct answer to the question regarding women's right to vote.