Officially the Servicemen's Readjustment Act of 1944, the G.I. Bill was created to help veterans of World War II. It established hospitals, made low-interest mortgages available and granted stipends covering tuition and expenses for veterans attending college or trade schools.
here are the structures i hope it helps
Answer:
primary, secondary, tertiary, and quaternary.
The answer is A) they provide a source of energy.
Cells at Work (Hataraku Saibou)