B. Two continental plates colliding
The correct option is this: THE FLOODING OF LAND CLEARED TO GROW CROPS. The correct option is D.
All the processes listed in the options above are affected in the negative way by agricultural practices. Cultural eutrophication occurs when all the living organisms in a body of water die as a result of pollution.This can be caused by fertilizer run offs. The recharging of underground water is negatively affected by agricultural practices, fertile lands also become desserts and sediment pollution from erosion occur from agricultural practices.
