Answer:
Soldiers fight it but never changes.
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
The King of Pop's stellar dance move
How do you spell hard water with only three letters?
What has a neck and no head, two arms but no hands?
How did the farmer find his wife?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?