Question

1. what moves deep water currents?

a. temperature
b. salinity
c. density differences
d. all of these

Explanation:

Deep water currents (also called thermohaline circulation) are driven by density differences in water. Density of water is affected by temperature (colder water is denser) and salinity (more saline water is denser). So temperature, salinity, and their combined effect (density differences) all contribute to moving deep water currents. Thus, all of these factors are involved.

Answer:

D. All of these