The correct answer is - b) faster.
The soil erosion has been gradually increasing and becoming faster and faster as the human populations grow, and as there's more and more human activities that effect this process. There's lots of ways in which the human kind contributes to faster soil erosion, including the agriculture, building, destroying the forest and shrubs, the air pollution causes acid rains to fall which are devastating in their effect. This is something that the surface of our planet hadn't witnessed before, and the results are truly devastating with the ever increasing rate of erosion around the globe.
