Answer:
Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?
What can run but canβt walk?
What moves without seeing and cries without eyes?
What do you use to hoe a row, slay a foe, and wring with woe?
Two brothers we are, great burdens we bear. All day we are bitterly pressed. Yet this I will say, we are full all the day, and empty when go to rest.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.