Final answer:
The Baby Boom after World War II caused a need for more housing in America.
Step-by-step explanation:
The event that caused a need for more housing in America was the Baby Boom after World War II. The Baby Boom refers to the significant increase in the birth rate, resulting in a large number of children being born between 1946 and 1964. This led to a growing population and a greater demand for housing to accommodate the expanding families.
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