Which one of the following factors is responsible for the change in the regular direction of the ocean currents in the Indian Ocean?

1. Ocean currents in the northern Indian Ocean exhibit a unique seasonal reversal of direction. 2. This change in the regular direction is primarily driven by the seasonal reversal of monsoon winds. 3. During the Southwest Monsoon (summer), winds blow from southwest to northeast, driving currents eastward. 4. During the Northeast Monsoon (winter), winds blow from northeast to southwest, reversing the currents westward. 5. This phenomenon is known as the monsoon drift. While the Indian Ocean being 'half an ocean' or land-locked contributes to the distinctiveness of its currents, the direct cause of the seasonal directional change is the monsoon wind system.