Answer:
Man walks over, and man swims under. In times of war, it can be burned asunder. What is it?
Slayer of regrets, old and new, sought by many, found by few.
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
What kind of pet always stays on the floor?
What makes a loud noise when changing its jacket, becomes larger but weighs less?
Brings the sky a lot closer.
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?