Which water type is densest?

A. Warm, saline water

B. Cold, saline water

C. Warm, non-saline water

D. Cold, non-saline water

The answer is D. cold, non-saline water

Liquid water (freshwater) at about 39 degrees F (4 degrees C) is densest in the ambient environment.

One could argue that water at the deepest parts of the ocean is most dense - due to immense hydrostatic pressures, but that is another matter.

; ) have a great day