In a referendum, citizens cast a vote on a law petitioned by the public. introduced in the courts. established by the governor. passed by the state legislature.

The correct answer is:

Passed by the state legislature.

In the United States, the process of referendum allows citizens of many U.S. states to place legislation that has recently been passed by a legislature on a ballot for a popular vote. Initiatives and referendums, along with recall elections and popular primary elections, are signature reforms of the Progressive Era and are written into several state constitutions, particularly in the West.