Answer:
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?
Take one royal word in the plural and make it singular by adding one letter
Mouth up it gets filled, mouth down it gets empty.
Used to keep prisoners silent and to make temporary repairs on cars.
Without this, H2O would just be 2O
I am a rock group with four members. All dead one was assassinated.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?