Question

which condition is a direct cause of surface currents

A. wind forces

B. differences in density

C. high salinity

D. uneven heating

Answer 1

The answer is B, differences in density, I believe.

A substance that is less dense will always stay above a substance that is more dense.  The difference in density actually causes the water to move, forming a density current. In the ocean, the deep bottom currents are cooler and more salty than the currents above. Hope this helps, and I would appreciate Brainliest! : )

Answer 2

keyword is surface - density, salinity n heating affect deep water

so ans is A. wind forces