The correct answer is option 4: All of the above. Recurring floods can be caused by a combination of factors, and in this case, all the options provided contribute to the occurrence of such floods. Soil erosion, which refers to the removal of topsoil and vegetation cover, can lead to reduced soil fertility and increased surface runoff, thereby increasing the risk of flooding. Deforestation, or the removal of trees and vegetation, can also worsen flooding by reducing the ability of land to absorb and store water. Additionally, the silting of river beds can cause the river channels to become shallower, resulting in a reduced capacity to carry water during heavy rainfall, leading to floods. Therefore, a combination of soil erosion, deforestation, and silting of river beds can contribute to the recurring flood problem.