Answer:
Soldiers line up spaced with pride. Two long rows lined side by side. One sole unit can decide, if the rows will unite or divide.
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
A building where people and stories are on stage
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
Why did the teacher have to wear sunglasses?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?