Correct Response: A. The cold, high salinity water of the North Atlantic has the greatest density because higher salt concentration and cold temperature increase water's density. Below 4°C the density of water drops slightly, but most of the water of the north Atlantic is above that temperature. As a result of this relationship between density and the salinity and temperature of water, warm high salinity water (B) will have a lower density than cold, high salinity water. Cold water with moderate salinity (C) will have a lower density than cold water with high salinity and warm water with relatively low salinity (D) will also be less dense than cold water with high salinity.
