Erosion is a geological surface process described as
the weathering and sorting of rock and soil
the chemical breaking down of rock and soil
the removal and transport of rock and soil
the deposition of rock and soil
the mechanical breaking down of rock and soil

Erosion is a geological surface process described as the weathering and sorting of rock and soil.

Explanation:

Erosion -

The geological process by which the earthen material like rock and soil are worn away or carried away by natural forces , which can be wind or water , is called Erosion.

Erosion is exactly opposite to the process of deposition , the geological process of depositing earthen material is called deposition .

Hence,

Erosion is a geological surface process which is described as -

the weathering and sorting of rock and soil.

7.03-1.70=5.33 and 6.80+5.09=11.89 and 5.5-3.01=2.49

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.