Explain how the role of the federal government changed during ww1

After WWI the government changed the way they did propaganda

to a way that helped them recruit soldiers for the military.  

It also helped raise spirits of the public during WWII.

It gave the public information on ways they could help their  

country without having to joining the army.

Explanation:

i think it would be a

food chain i would say only because there is competition on getting food and survival