I believe it would be A) erosion of topsoil.
I hope this helps :)
Explanation:
The Western Gulf Coastal Grasslands ecoregion follows the coast of the Gulf of Mexico encompassing the wetlands of Louisiana and Texas, in the United States, west of the Mississippi Delta then south into Mexico to just past the Laguna Madre.
Stephen A. Douglas (1813-1861) was a U.S. politician, leader of the Democratic Party
Maynard Jackson was the first