Answer:
What is full of holes but still holds water?
What has an eye but cannot see?
I am the book one can never finish reading
What can fill a room but takes up no space?
In wealth I abound; in water I stand; as a fencer I'm valued all over the land; at Venice I'm famous; by farmers I'm prized; respected by law yet huntsmen despised; consternation and ruin ensue when I break; And the beasts of the forest advantage won't take.
Give it food and it will live, give it water and it will die.