The southern colonies' economy had growing labor demands
This is because the South's economy relied on the agriculture, which required more physical labor than the industrial factories the North relied on.
The expression 7x-36 is equivalent to this question.
The historic moment created the first transcontinental railroad, Enabling travelers to go from coast to coast in a weeks time making it markedly easier to travel west in search of land for settlement. Desiring Quick payment of loans rolls encourage the service to grow and sell cash crops
