How did indentured servitude and slavery arise in North America?

Indentured servitude and slavery arose in North America by the colonies/ colonists

needed another source of labor since most Native Americans became sick and as a

result died because they weren't immune to the diseases that the Europeans brought

with them to America. The colonists, especially Spanish priest Bartolome de Las Casas

came up with an idea of enslaving/ capturing Africans to America to do the work

because they had an immunity to the British diseases. Over colonial time, the demands

for slaves increased. Since their was very high death rates, which led to labor

shortages, the colonists began using indentured servants [were servants that signed a

contract to work for four to seven years for those who paid for their journey to

America].

That is how indentured servitude and slavery arose in North America.