Explain how would decrease in the volume of rivers affect the farmers​

B. to study the spatial patterning of forests and forests fires and plan for better use of fire fighting resources in the u.s.

Answer the collision of tectonic plates;

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.