Ao longo do dia natural, a radiação solar absorvida por unidade de superfície é maior

Geologists use  seismic waves to  locate an earthquake's epicenter.. 

Answer carbon dioxide ice;

How is this even a question?

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.