What are prevailing winds that flow at high speeds in the upper atmosphere?
a. jet streamsb. westerliesc. easterliesd. trade winds

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.