Which answer best summarizes the benefit of slaves to a typical colonial family

Assuming that this is referring to the same list of options that was posted before with this question, the correct response would be the one having to do with the fact that slaves provided a free source of labor after their initial purchase.

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.