Generally it is a third world country (or similar) that is starting to develop its resources and upgrade on its society. It is when poverty begins to lower and more wealth is belonged to the country.
The sergeniti is the most famous part of the plains in Africa
At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be denser and thinner than continental crust, so the denser oceanic crust gets bent and pulled under, or subducted, beneath the lighter and thicker continental crust. This forms what is called a subduction zone.
The answer is either sugar or tobacco as they were both essential crops to the Caribbean Islands economy.