Which of the earth’s biomes covers over 70% of the earth’s surface? a. desert b. marine c. coniferous forest d. deciduous forest

The answer is B Marine

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.