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
I think it is Phytoplankton.
Answer:
go to this link https://www.numerade.com/ask/question/a-hospital-is-trying-to-cut-down-on-emergency-room-wait-times-it-is-interested-in-the-amount-of-time-patients-must-wait-before-being-called-back-to-be-examined-an-investigation-committee-randomly-surv/ it will explain your answer
Explanation: