Answer:
Without this, eating food and Steven Spielberg's career would be very different.
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.
What can be swallowed, But can also swallow you?
What letter comes next: O T T F F S S ?
Come up and let us go. Go down and here we stay
People take me on walks and I run and have fun. What am I?