Answer:
I believe it is Genus, but I'm not sure.
Explanation:
Erosion is brought about by the forces of nature or human activity: water, wind, earthquakes, mining, quarrying, etc. In the desert, there is very little water that can cause weathering or erosion, so the most probable answer is wind or maybe even animal activity.
You and that friend would eventally start runing out of food, then its competition. You'll have to fight over it survival of the fitest
