Why factor contributes least of the formation and motion if ocean currents?

The factor that contributes least to the formation and motion of ocean currents is the gravitational pull from the moon and the sun, which primarily affects tidal movements rather than sustained currents. Ocean currents are more significantly driven by wind patterns, the Earth's rotation (Coriolis effect), and differences in water temperature and salinity. While tides can influence local water movement, they do not play a major role in the continuous flow of ocean currents compared to these other factors.