Worldwide, the most prominent type of intraregional migration is from a) to b) areas. In the US, the principal intraregional migration is from c) to d) .

The most promiment type of intraregional migration is from rural areas to urban areas.

This process is known as urbanization, and it is a worlwide phenomenon. At the turn of the twentieth century, most people in the world lived in rural areas, currently, this number is around 55%, and expected to rise rapidly in the coming decades.

In the United States, the principal form of intraregional migration is from North to South.

Among the states with the highest population growth in the United States are: Texas, Florida, Nevada, Arizona, North Carolina, South Carolina, and Georgia, all located in the Southeast or Southwest, being part of what is known as the "sun-belt". As the name implies, one of the main reasons for people moving to those states is the warmer climate, and also, better economic prospects and lower cost of living.

On the other hand, northern states such as Connecticut, Rhode Island, Michigan, Wisconsin and Ohio show very little population growth, and some of the reasons are: colder climate, high cost of living, and poor economic growth.

Explanation:

mass production/ assembly line production

the two things that develop a strong social foundation are: a. separation of church and states e. education received attention separation of church and states separate the illogical  argument that came from religious beliefs to a fact based belief. while education will make us remember the past to avoid the repeat of our mistakes.