What is cause horizontal movement of water ocean?

Horizontal movement of ocean water, known as ocean currents, is primarily caused by wind patterns, the Earth's rotation (Coriolis effect), and differences in water density due to temperature and salinity variations. Surface currents are mainly driven by wind, while deeper currents are influenced by thermohaline circulation, which is affected by the density of seawater. Additionally, the shape of Coastlines and the seafloor can also impact the direction and speed of these currents. Together, these factors create a complex system that regulates global climate and marine ecosystems.