Find the odd one out and give an explanation for your choice.

Centrifugal force, solar energy, precipitation and effects of wind are factors affecting ocean current. But tectonics is the plates which are on the earth’s surface.

• Centrifugal force: Centrifugal force is the outward force on mass when the earth is rotating. It is the force away from the axis, opposite to the direction of the gravity in the equator. It is necessary to keep the masses in a straight line.

• Precipitation: It is the mechanism or transportation process in which the condensed water is reaches the earth’s surface. The equatorial areas receive the greatest rainfall hence the sea level is higher. This contributes majorly towards the sea level in the earth.

• Solar Energy: solar energy is the conventional source of energy which increases energy by the way of heating. Heating by solar energy causes the water to expand. And also the evaporation takes place due to solar energy and increases the salt content in the soil.

• Tectonics: The lithosphere is broken into a number of plates which is known as tectonic plates. These plates move slowly because of the movement of molten magma inside the earth's surface.