Answer:
Often found in doctor's offices and pirate flags
What devours all and can kill a king. Destroy a town and crushes mountains down?
An image taken from real life
In the sun it likes to play; In the rain it goes away; Walk or run it always follows; In the mud it always wallows.
What is seen in the water and in the sky? It is part of the rainbow and can be in your eye
I am a room that has a roof but no walls. What am I?