Answer:
Slavery started in the colonies because as more and more people came from overseas they bought lots of land for farming. There weren't enough people to work on the land and the owners didn't like that they had to pay people to farm and harvest their crops.
Slaves were brought to colonies by boats.
In New, England slaves would work in their owner's home as house slaves cleaning the house cooking dinner, and sometimes taking care of the children. In the middle and southern colonies, slaves would work on the plantations and also in the home.
The jobs were different in each region because there were different settings. The middle and south colonies had more land and nicer weather for farming. But New, England did a lot of trade and fishing because the weather wasn't as nice.