All of the above -
down payments reduce how much you have to pay back, same with purchase price of house.
Length of the mortgage means that you’ll pay back over a longer period of time - effectively reducing the mortgage payment per month.
As the labor in Spain demanded to grow, the labor source for imperial production changed or transitioned to the African Slaves. These African slaves came from the western and central part of Africa. They had been sold to the slave traders in Western Europe.