Answer:
Give it food and it will live, give it water and it will die.
You can always see it, but it's too far away to touch. Mountains rest on it, and at sea it surrounds you. What is it?
We travel much, yet prisoners are, and close confined to boot. Yet with any horse, we will keep the pace, and will always go on foot.
What loses its head in the morning and gets it back at night?
What word is a plural, but when you add an "S" to the end, it becomes singular?
What sphinxes employ and players enjoy.