I Believe that would be the opium war?
Europeans started to enslave Africans.
They started to use slaves instead of indentured servants, because the investment was better. Indentured servants only served for a few years, and then were granted freedom, while slaves were purchased and used for their entire lives. The investment of a slave was better than an indentured servant.
What the afterlife looks like.
Answer:
The outermost layer of the Sun's interior - Convection Zone
The location where nuclear fusion occurs - Core
The layer of the interior where the temperature drops from 7,000,000°C to 2,000,000° - Radiation Zone
Hope this helps :)
Explanation: