What are the interregional migration trends of the United States today?

Southern states has the highest number of in-migration.

Explanation:

Interregional migration refers to the type of migration that occurred from one part of a country to another part of the same country. According to the data provided by United States' government, Florida and Texas were the two states that became the main target destination from citizens.  

The most likely reason for this migration trend is because both of those states do not have state income tax. This means that people tend to have higher amount of disposable income if they move to those two states.

answer; i do believe its (b) 12.5 years of age;

its kind of blury sorry