Answer:
humidity oxygen content and salinity are abiotic
1.economy and exporting materials
2.need more information
3. it increased in the south because crop grow was more popular in the south because they had better climate
2 Reasons they had to leave was 1. They were sold to cocasion/white owners and they had to leave, and 2. The cocasion slave owners felt that the a african americans didn't belong so they took them and beat them and stuff like that. (that is cruel man) Happy to Help! :D