Final answer:
The postwar demographic change of moving to "cookie cutter" houses in the suburbs is best symbolized by Levittown, a mass-produced suburban housing development.
Step-by-step explanation:
The postwar demographic change of moving to "cookie cutter" houses in the suburbs is best symbolized by Levittown, a mass-produced suburban housing development. In the 1950s, the rise of suburbs in the post-WWII era brought profound changes to American cities. This included the creation of planned communities like Levittown, where thousands of identical homes were built quickly and affordably to meet the demand of families wanting to achieve the American dream of homeownership. Levittown and similar suburban developments represented a shift in housing patterns and suburbanization in the United States.