Answer:
A spent round or a slimy critter.
The homes of tiny creatures that collect in corners if you aren't vigilant about dusting.
When they are caught, they are thrown away. When they escape, you itch all day.
I am a animal i have sharp teeth i am the king of the forest
What is common to eat before it's born and after it's dead?
I build up castles. I tear down mountains. I make some men blind. I help others to see.