Answer:
Many people migrated from the North and East to the Sun Belt states during the 1950s because of the expansion of urban areas.
Step-by-step explanation:
The Sun Belt is the region of the United States comprising the south and southwest of this country. This region showed great economic and demographic growth compared to the rust belt, a region that comprises the north and northeast of the United States.
For this reason, many people migrated from the North and East to the Sun Belt states during the 1950s.