Explain why china has a higher total footprint than the united states, but a smaller footprint per person

China has a smaller country so everyone is crowded

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.

The answer is winds.