Answer:
Take off my skin, I won't cry, but you will.
Large as a mountain, small as a pea, Endlessly swimming in a water-less sea.
Two men walk into a restaurant. One man orders H2O. The second man says, “I will have H2O too.” The second man dies. How come the second man dies?
I cost no money to use, or conscious effort to take part of. And as far as you can see, there is nothing to me. But without me, you are dead.
By the way, what never moves, wears shoes, sandals and boots, but has no feet?
I have two eyes in the front and a lot of eyes on my tail
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?