Climate change and human activity like overgrazing of grasslands is leading to large areas subject to "desertification" where native grass cover dies out during drought periods, exposing soil to erosion. what is potentially the greatest initial soil erosion potential during this type of an event?

loss of topsoil by wind erosion on a large scale

Explanation:

Climate change and interference of humans to a natural activity like overgrazing can lead to desertification which results in the grass to die out and causing soil erosion. The commencement of soil erosion occurs when there is loss of topsoil by wind erosion which causes the soil particle to drift from their original position to heap up at another site. This can lead to loss of nutrients and Productivity of soil. The Fine dust particles deposited over soil and cause pollution by dispersing sand particles in the air. A minimum threshold velocity is needed to lift the sand particles to initiate wind erosion.

well considering i can't see the graph, it's probably prices