Answer:
Only two backbones and thousands of ribs.
Without this, eating food and Steven Spielberg's career would be very different.
Large as a mountain, small as a pea, Endlessly swimming in a water-less sea.
What looks back but cannot see?
What instrument can make any sound and be heart, but not touched or seen?
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?