Final answer:
During World War I, the U.S. government created agencies like the War Industries Board, the War Labor Board, and the Food Administration to control industrial output and the economy, marking a departure from laissez-faire policies to meet wartime needs.
Step-by-step explanation:
The creation of the War Industries Board (WIB), the War Labor Board, and the Food Administration during World War I indicates that in times of war, the U.S. government takes on a more active role in economic and industrial regulation. The WIB, for instance, was tasked with controlling prices and organizing production to support the war effort, a significant shift from the country's traditional laissez-faire economic policies. The National War Labor Board, on the other hand, worked to prevent labor disputes by mediating between factory owners and workers on issues like wages and working hours. The Food Administration regulated the distribution and supply of food to ensure the armed forces and civilian population were adequately provided for. These organizations demonstrate how the government's intervention in industries and labor relations was crucial for mobilizing the economy during wartime.