Choose all the true statements about soil erosion

humans are the sole cause of soil erosion
weathering is the wearing away of surface soil by water and wind
contour plowing is a method of farming across the slope of the land to reduce erosion
deforestation has no impact on soil erosion
windbreaks are used to prevent wind erosion on farmland.
desertification can occur in heavily eroded areas due to human impact.
the timing at which farmers plant their crops can with soil erosion