What are three ways that the density of ocean water can increase?

Three of the most obvious ways the density of an ocean (can be applied to any body of water) are ->

temperature (colder water is denser down to 4 degrees c, but anything between 4 and 0 degrees c is lighter and floats to the top (that's why the top of water freezes before the bottom :) ) )

solute percentage ( in oceans a main solute is salt - we put more salt into the ocean and it gets denser, we filter out the salt and the water gets less dense)

population & pollution ( fish or soda cans don't directly change water density, but the waste products and disolved rust make it denser)

The zhou dynasty (1046-256 bce) was the longest-lasting of china's dynasties. it followed the shang dynasty (c. 1600-1046 bce) and it finished when the army of the state of qin captured the city of chengzhou in 256 bce.

Ithink i might know wait one second let me serve