Conflict in africa was largely the result of a system under which an outside government takes control of an area for its own benefit.

1. antarctica2. saudi arabia

The answer is c, i, iii, and iv. this is because farming and mining deal with harvesting raw materials, construction work falls under manufacturing, and piloting a plane is a service. ii is wrong because making bread is using  raw materials to produce goods, which would fall under the secondary sector, not primary.