Answer:
What comes in many varieties and can't be seen or touched, but it often makes you move?
Many foods can make me strong but give me water and I won't last long.
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
What kind of room doesn't have physical walls?
War fought with pieces on a board.
Born of earth, but with none of its strength. Molded by flame, but with none of its power. Shaped