Sarah needs to leave the plantation because she is very sick and unable to continue her work.
Sarah has to work as a slave in the fields while caring for her baby. She represents the violence of slavery and the powerlessness of enslaved people to react.
This situation leaves Sarah extremely ill and unable to continue the heavy work, which causes her to leave the plantation.
This question is about the book "The people could fly."
More information about slavery at the link:
https://brainly.com/question/9331183