Consider the following factors: 1. Rotation of the Earth 2. Air pressure and wind 3. Density of ocean water 4. Revolution of the Earth Which of the above factors influence the ocean currents?

1. Factor 1 (Rotation of the Earth) is correct. The Earth's rotation causes the Coriolis effect, which deflects moving objects (including water) to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This significantly influences the direction and path of ocean currents. 2. Factor 2 (Air pressure and wind) is correct. Surface winds, driven by differences in air pressure, exert frictional drag on the ocean surface, setting the surface water in motion and driving the major surface ocean currents (wind-driven circulation). 3. Factor 3 (Density of ocean water) is correct. Differences in the density of ocean water, caused by variations in temperature (thermo) and salinity (haline), drive deep ocean currents, also known as thermohaline circulation. Denser water sinks and flows beneath less dense water. 4. Factor 4 (Revolution of the Earth) is incorrect as a direct factor. The Earth's revolution around the sun causes seasons, which indirectly affect ocean currents by influencing temperature, wind patterns, and salinity. However, it is not considered a primary, direct force driving ocean currents like rotation, wind, or density differences. 5. Therefore, the factors that directly influence ocean currents are Rotation of the Earth, Air pressure and wind, and Density of ocean water.