Results in the continuous circulation of ocean water on a global scale.

Temperature differences in the water move the water around the globe along with deep ocean currents and tidal forces from the moon will cause some movement of the water around the earth.

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.