How has climate and history helped determine the population patterns of the Arabian Peninsula?

Brazzaville and kinshasha, luanda,librevilleand and monrovia.

Answerair masses develop near the equator are warm; tropical air mass

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.