Why did the colonies come to depend on enslaved Africans?

Explanation:

In the Triangular Trade, enslaved Africans were imported from Africa to the American colonies as the labor force needed to produce cash crops, which were exported to Europe in exchange for manufactured goods

for hobos it was a very hard time most hid on the sides of the railroad tracks causing people to get bulls and get them off sometimes causing in fatal death they couldnt get people to give them money because the   people were also in need of money

they move troops weapons suplies food water shelter vehicles ect. hope this : 3