It could be because some parts of the south had more farms, while others did not. Some areas could be more populated or filled with richer people (which would allow the rich to buy and own slaves)
It was because they <span>were protesting the occupation of their city by British troops, who were sent to Boston in 1768 to enforce unpopular taxation measures passed by a British parliament that lacked American representation. They didn't like being controlled and taxed, therefore, they fought by protesting at first, but it led to a Massacre where many died.</span>