Answer:
My teeth are sharp, my back is straight, to cut things up it is my fate.
What tree that definitely grows does not have a shadow and does not grow fruit?
I grow where no flower grows, where no light touches the walls, up or down, that I don't care, was here before people were.
It floats over the land, It cuts the tallest mountain, Its voice is like a fountain, Its body like a snake, Will flow into a lake.
Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters. What is it?
It produces a flower but it is not its fruitΝΎ it produces branches which are its fruit.