Final answer:
Since the 1960s, the United States has seen increased migration from Asia and Mexico, with Asian immigrants often seeking education and professional opportunities, and Mexican migrants looking for better living conditions and work. The Sunbelt states have experienced a population surge due to job opportunities in various industries, better climate, and lifestyle.
Step-by-step explanation:
The two areas that have seen increased migration to the U.S. since the 1960s are primarily from Asia and Mexico. Since the 1970s, the United States has experienced new waves of immigration, significantly influencing the country's demographics. In the earlier decades, immigration was mostly from European countries, but this shifted with the Asian immigration surge and the consistent flow of migrants from Mexico, substantially altering the cultural and economic landscape of the U.S. The migration from Asia largely comprised individuals seeking educational and professional opportunities, while many Mexican migrants were driven by the search for better living conditions and work.
Within the U.S., the population movement has been markedly from rural to urban areas and from various regions to the Sunbelt states. Jobs in recreation, high-tech firms, information technologies, and service industries drove this internal migration, resulting in a notable population increase in the South and Southwest. The Sunbelt, particularly attractive for its climate, economic opportunities, and lifestyle, has seen a significant rise in its population, with urban and suburban growth fueled by affordable housing and less crowding compared to regions like southern California.