Answer: The lateral erosion of a river causes overhanging cliffs to occur along the bank.
The lateral erosion causes widening of the river. As the river flows over the flatter land it leads to development of larger bends called as meanders. When the river flows around a bend the water gets pushed outside and leads to more speed and increase in erosion by the hydraulic action and abrasion.
The lateral erosion on the outer bend leads to undercutting of the river bank and formation of a river cliff.