Avatar Course - Week 2 // Water & Fire

"For several thousand years man has been changing the face and aspects of the land…[The oceans] are forever changing, yet forever the same. Heaving with their tides, flowing with their currents, piled and pried by the hurricane or lying gentle and serene, forever being evaporated and forever replenished , they are the epitome of change. Yet, beneath and in spite of moods and movement, they are in form and substance the most timeless feature of the earth. So they have been for a billion years, and more. So will they be when all our proud mountains have been worn to hills"  - Thompson King. Water: Miracle of Nature

Who is the most powerful waterbender?  What attribute of water gives them strength?