Will mark brainliest! if its right! scientists have discovered convection currents inside earth. explain how these convection currents move and what layer(s) they occur in 

Convection currents occur in the mantle and the outer core of the earth’s interior.   The convections in the mantle are responsible for the tectonic plates movement of the crust. The convection currents in the outer core are significant in generating the earth’s  magnetic fields.    

ANSWER:

Convection current production is a natural process that occurs in three layers of earth:

Movement of convection currents:

windward

since there isn't any suggested answers i will give you the reason and hopefully you can figure it

south africa, or rather all of africa, has not been in the location in which it is nowadays throughout the geological past. after the super-continent pangaea started to break apart, gondwanaland, in which was africa, moved further south, and parts of it came to be very close to the south pole. because the climate in this part of the world is very cold due to the very dispersed sun rays in there, what is now south africa, started to freeze, and the conditions were right for the formation of glaciers. the glaciers existed up until the period when gondwanaland started to break apart and what is now africa started to move towards north, sp it warmed up and the glaciers melted.