Which amendment to the Constitution grants the right to vote to citizens eighteen and older?

The 26th Amendment to the Constitution is the one that specifically grants the right to vote to citizens who are eighteen years of age and older. Ratified in 1971, this amendment came about largely in response to the arguments that those who were old enough to be conscripted for military service in the Vietnam War should also have the right to participate in the electoral process. By lowering the voting age from twenty-one to eighteen, the amendment ensured that younger citizens could have a voice in the democratic process and engage in civic duties, reflecting the evolving attitudes toward youth and civic engagement during that era.

In contrast, the other amendments focus on different voting rights issues: the 15th Amendment prohibits denying the right to vote based on race, the 19th Amendment grants women the right to vote, and the 25th Amendment addresses presidential succession and disability but does not relate to voting rights. Understanding the specific purpose and context of each amendment helps clarify why the 26th Amendment is the correct answer in this case.