Question

What are the factors affecting ocean currents?
A. Earth’s rotation
B. Winds across ocean
C. Density of water
D. All of the above.

Answer 1

Hint:Movement of water and patterns which influence the weather and climate All around the world are known as ocean currents.
It is a continuous movement of water following a particular direction in Ocean , caused by action of a number of forces upon the water.

Complete answer:
Earth's rotation
Due to the rotation of earth coriolis force generated which deflects the direction of ocean currents .
Due to its impact ocean currents deflect towards right in the Northern hemisphere and towards left in the Southern hemisphere.
Winds over ocean
The prevailing planetary and other winds such as trade winds, polar winds and westerlies.
The wind blowing over the surface of the ocean also carries the water in which direction. most of the ocean currents of the world follow the direction of prevailing wind.
Density of water
Density on the ocean water is also known as Oceanic salinity.
Due to this salinity and density variation ocean currents are formed salinity increases the density of water.
Ocean currents move from low salinity areas towards the higher salinity area, generating surface and subsurface currents. Due to density difference vertical mobility of ocean currents is also affected.

Therefore, the correct option is D.

Note:Due to the temperature difference of the place of origin of ocean currents they are divided into cold current and warm current.
Ocean currents flow in large circular paths known as gyres . There are many Gyres all around the globe, the most notable five major gyres are formed in Indian Ocean, Atlantic ocean and Pacific Ocean.
Factors like Pressure gradient and temperature variations also contribute to the formation of ocean currents.