Magma from deep inside the earth rises toward the surface because

Because pressure builds up under the earths crust from submerging land that melts into magma

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.

Answer. scale;