Answer:
Without what would everyone lose their head?
I occur twice in eternity. And I'm always within sight.
What has keys but no locks, Space but no room, You can enter but you can’t exit.
What devours all and can kill a king. Destroy a town and crushes mountains down?
Said to have fifty shades
I'm the source of all emotion but I'm caged in a white prison.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?