The migration caused by the transatlantic slave trade produced the issue of:
the depopulation of young women and men in Africa.
The transatlantic slave trade significantly reduced the population of young adults in Africa due to the forced removal of millions of people. The other responses, such as rapid economic development in Africa, political stability in Africa, and racial oppression from Jim Crow laws, are more indirect consequences that resulted from the broader context of slavery and colonialism but not direct effects of the migration itself.