A region spanning the South and Southwest with population growth due to retirees and immigrants

• A. Northeast
• B. Pacific Northwest
• C. Sunbelt
• D. South

Answer: (C)

Recognizing a region defined by rapid population growth from retirees and immigrants. The Sun Belt describes a broad arc across the South and Southwest, where postwar prosperity, jobs in expanding industries, and climate attracted people from different backgrounds. Retirees moved to warmer states like Florida and Arizona, while migrants from other countries came seeking work in growing service, manufacturing, and defense sectors. The combination of favorable climate, new housing, and economic opportunities helped the population surge, reshaping demographics and politics across the country. The Northeast and Pacific Northwest don’t fit this same pattern of large retiree influx coupled with immigrant settlement, and the South alone is less precise about the distinct Southwest growth. So the region that matches this description is the Sun Belt.