In a turbine pump, axial thrust is the force exerted along the axis of the pump shaft due to the pressure difference between the suction and delivery sides. The pressure is higher on the delivery side (where water is pumped out) compared to the suction side (where water is drawn in), causing the axial thrust to act from the suction side toward the delivery side. This thrust must be balanced, often using thrust bearings, to prevent damage to the pump. It does not act perpendicular to the shaft or solely in the delivery pipe.
Thus, the correct answer is From suction side to delivery side.