Landslides, mudflow, slump and creep are all examples of
a. constructive force
c. mass movement
b. deconstructive force
d. none of the above

(C) Mass movement

Explanation:

 Mass movement is also known as slope movement and it is the geographical process in which the sand, soil and the rock moves towards the down slope under the force of gravitation.

The mass movement is one of the dangerous movement as it happened very quickly and it also involve the entire hill side areas. The frequency of the mass movement is generally characterized as the flow in the mud and the debris flows. The process of the mass movement are occurred continuously on the slope.

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.