What changes caused the great migration

The first (or most important) factors for moving (from one place to another) among southern African Americans were (separating things/separating people by race, religion, etc.), an increase in the spread of racist belief systems, (existing all over a large area) murder (by hanging by the neck) (nearly 3,500 African Americans were hung (by the neck) between 1882 and 1968), and lack of social and money-based opportunities in the South.

what excerpt?

explanation:

the anwser is went creeping down the river again, across the wide lonely marshes to the sea.

i longed to go with them out into the world to seek my fortune in foreign lands—africa, india, china and peru!

and, dreaming of the lands i had never seen, i'd sit on there, watching till they were out of sight.