Answer:
Feed me and I live. Give me water and I die. What am I?
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
I am a delicious way of representing data.
I'm really blue but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt.
You can catch me but cannot throw me. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.