Answer:
I'm pretty sure it would be erosion (Number C)
Step-by-step explanation:
Because if a forest is cut down it won't help with global cooling only global warming, and it wouldn't be traffic congestion because this does not look like it's near a road. That leaves us with erosion because when the trees are cleared out, water will cause erosion and the trees won't be able to stop it, If desertification is a choice please tell me because I can help you more if that is the case.