Answer:
I help boats park
What has one head one foot and four legs?
Better touch me before you proceed to second.
What is shaped like a box, has no feet, and runs up and down?
Every night I'm told what to do, and each morning I do what I'm told. But I still don't escape your scold. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.