17._________contains plenty of salt.It is found in the seas and oceans.Seawater is also called.
18.________.
19._________is found beneath the earth's surface.it comes from water that seeps into the ground.it is considered the cleanest water and contains plenty of dissolved minerals which the human body needs.
20.________ is also called surface water.This is found in opem but small bodies of watee loke rivers,lakes,creeks,and ponds.surface water comes mostly from rain.

Choices
Hard water
Sea water
fresh water
ground water​