Answer:
What is the word that even in plain sight remains hidden?
What do people spend a lot of money on every year, but never want to use?
You hear me speak, for I have a hard tongue. But I cannot breathe, for I have not a lung. What am I?
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
I have cities with no people, forests with no trees, and oceans with no water. What am I?
Give it food and it will live, give it water and it will die.