Correct Option
The correct option is 1 and 3 only.
Explanation
Ocean currents are continuous and directed movements of ocean water along a defined path.
The movement of ocean currents is controlled by primary forces such as wind, solar heating, gravity, and the Coriolis force. Solar heating is a primary force because differential heating creates expansion, slope, and pressure differences in ocean water.
- Statement 1: Correct. Ocean currents represent a regular movement of a large volume of ocean water in a definite path and direction.
- Statement 2: Incorrect. Heating by solar energy is not a secondary force; it is a primary force influencing ocean currents by causing differential heating and water movement.
- Statement 3: Correct. The Coriolis force is treated as a primary force affecting ocean currents, as it deflects moving water to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
Therefore, statements 1 and 3 are correct.
Key Takeaway: Solar heating and Coriolis force are primary forces associated with ocean currents, while Coriolis force mainly determines the direction of moving water.