The Great Migration (which actually continued until 1970s) was a migration from the South to the North.
In the beginning of the migration around 90% of the Black population lived in the South - a legacy of slavery, and after the migration period, it was around half of the Black population living in the South.
Answer: Selective optimization with compensation
Explanation: Based on the above scenario the principle at work is Selective optimization with compensation. This theory was developed by Paul and Margaret Baltes, that individuals try to maintain a balance in their lives by looking for the most effective way to compensate for physical and cognitive losses and to become better in activities they can already do well.
Answer:
Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships and tankers without warning. I don't know what you want for an example, but Germany used it in World War 1.
True I think I m not sure
