How can understanding how plates move today help explain how plates moved in the past ?

They moved the same by convection currents, convection currents are caused by radioactive decay in the Earth’s core, the convection currents move the plates

Answerinflux;

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.