Some developing countries rely on a single cash crop such as cotton or sugar. what can the origin of this practice be traced to?

The choices can be found elsewhere and as follows:

(1) introduction of communism
(2) establishment of democratic governments
(3) colonization of the region
(4) movements to gain independence

The correct answer would be option 3. The origin of this practice can be traced to colonization of the region. Hope this answers the question. Have a nice day.