Which type of water is the most dense?
a. cold water with low salt content
b. cold water with high salt content
c. warm water with no salt
d. warm, salty water

The correct answer is B. Cold water with high salt content. The colder the water the more the molecules come closer and the water becomes denser. Eventually it becomes ice which is definitely the densest form. Salinity also increases it, the more salt there is the denser the water will be meaning that things will float more.

Wind causes waves to form