Answer:
What is eaten but not grown and was born in water but will disappear if soaked?
You eat something you neither plant nor plow. It is the son of water, but if water touches it, it dies.
The land was white the seed was black it'll take a good scholar to riddle me that. What is it?
I build up castles. I tear down mountains. I make some men blind. I help others to see.
I drive men mad for love of me. Easily beaten, never free.
hide me from your parents if you have done bad academically this year.