Final answer:
During WW2, US citizens helped the war effort by taking on roles in munitions factories, joining the military, conserving resources, and participating in scrap drives.
Step-by-step explanation:
During World War II, US citizens contributed to the war effort in various ways. Firstly, many people left their jobs to take on roles that directly supported the war effort, such as working in munitions factories or joining the military. Women played a crucial role in the war effort, with opportunities opening up for them to work in defense plants and factories, taking on positions previously held by men. Additionally, civilians on the home front helped by recycling, conserving resources, and participating in scrap drives. They saved cooking fats, collected scrap metal, paper, rubber, and other materials needed for the production of war materiel.