How did democracy change through initiative, recall and referendum during the Progressive Era?

The correct answer to this open question is the following.

Democracy changed through initiative, recall, and referendum during the Progressive Era in that American citizens could have the opportunity to participate more in US politics, made their voice heard, and demanded more results to the government. American people used initiative, recall, and referendum to exert their vote or petition to their representatives to solve issues that affected communities and US society.

Initiative, Referendum and Recall are three powers reserved to the voters to enable them, by petition, to propose or repeal legislation or to remove an elected official from office.