Which of the following is a way that humans speed up the process of erosion?
a. urban development
b. hiking
c. deforestation
d. all of the above

(D) All of the above

Explanation:

  All the given options are the way that are caused by the humans and it speed up the erosion process. Erosion is the natural and the geological process where the wind, water and the ice transport sand, rocks and the soil away.

The erosion process mainly occur on the surface of the earth and it has no major effect on the core and the mantle of the earth. The deforestation and the development of the urbanization increases the process of erosion.

Therefore, Option (D) is correct.

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.