Question

which of the following has the biggest effect on deep ocean currents?
a. tides and salinity
b. temperature and wind
c. density (temperature and salinity)
d. tides and wind

Explanation:

Deep - ocean currents are mainly driven by density differences in seawater. Density is affected by temperature (colder water is denser) and salinity (higher - salinity water is denser). Tides mainly affect the rise and fall of sea levels and have a relatively small direct impact on deep - ocean currents. Wind mainly affects surface - ocean currents.

Answer:

C. density (temperature and salinity)