Which of the following rights was expanded by the 26th Amendment?

The 26th Amendment to the United States Constitution specifically expanded the right to vote by lowering the voting age to 18 years. Ratified in 1971, this amendment aimed to enhance democratic participation by acknowledging that individuals aged 18 and older possess the maturity and judgment necessary to participate in elections. This change responded to the growing sentiment that if young people were considered old enough to fight for their country in conflicts such as the Vietnam War, they should also have the right to vote on issues that affect their lives and futures. Thus, the correct answer relates directly to the extension of voting rights to a younger population, making it significant in the context of American democracy and civil rights.