Final answer:
The creation of these federal agencies during World War I represented the government's temporary expansion of power over the economy to effectively manage resources and productions for the war effort.
Step-by-step explanation:
The creation of federal agencies such as the War Industries Board, Food Administration, Fuel Administration, Railroad Administration, Emergency Ship Corporation, and the War Labor Board indicated the government's temporary powers over the economy during World War I. These agencies were part of an effort to coordinate resources, production, and labor to support the war effort.
The War Industries Board, for instance, was created to efficiently manage the production of war materials and goods vital to the soldiers and home front during the conflict. Similarly, the Food and Fuel Administrations were established to regulate the distribution and price of essential commodities, with initiatives like daylight saving time and volunteer rationing to ensure adequate supplies for military and civilian use.