Final answer:
The United States became more democratic during the Progressive Era through the elimination of the poll tax, direct election of senators, and granting 18-year-olds the right to vote.
Step-by-step explanation:
The subject of this question is Social Studies, and it pertains to the Progressive Era in US history.
During the Progressive Era, the United States became more democratic through various political changes. One of these changes was the adoption of a constitutional amendment that eliminated the poll tax, which was a financial barrier to voting that disproportionately affected minority groups.
Additionally, another constitutional amendment provided for the direct election of United States Senators, giving citizens a greater say in the political process. Lastly, the adoption of the 26th Amendment in 1971 gave 18-year-old citizens the right to vote, further extending the democratic process in the United States.
Learn more about The impact of the Progressive Era on US democracy