text: <unk>  has multiple meanings:<unk> ing involves enlarging the cross-section of a river channel by deepening or widening the river to increase its hydraulic efficiency. This allows a larger discharge to be contained within the channel. Dredging is used to remove surplus sediment from the river bed and vegetation clearance is used to remove it from the bed and banks.
option_0: Resection
option_1: Chemotherapy
option_2: Irradiation
option_3: Hamman-Rich syndrome surgery
option_4: Hepatectomy
option_5: Detoxification
option_6: Hemicorporectomy
option_7: Implantation