Which movement sought to reduce or eliminate alcohol consumption in the early 20th century?

The Temperance Movement was a significant social and political effort in the late 19th and early 20th centuries aimed at reducing or completely eliminating alcohol consumption. This movement arose in response to the widespread social issues associated with alcohol, including health problems, family violence, and workplace accidents. Advocates believed that reducing alcohol consumption could lead to a more moral, stable, and productive society. The movement gained momentum through various organizations, particularly the Women's Christian Temperance Union and the Anti-Saloon League, leading ultimately to the passage of the 18th Amendment in 1919, which instituted Prohibition in the United States.

In contrast, the Labor Movement focused on workers’ rights and better working conditions, the Civil Rights Movement aimed at ending racial segregation and discrimination, and the Suffragette Movement sought to secure women's right to vote. While these movements were crucial in their own right, they did not center around the issue of alcohol consumption. The specific focus on temperance makes the Temperance Movement the correct answer.