The apperant backward movement of a planet is called?

Retrograde motion is the term defined as the apparent backward movement of a planet. 

 Retrograde motion is the apperant backward movement of a planet. This motion can be the orbit of one body about another body

South wales composes a lot of coal in that region.

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.