Answer:
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
What tree that definitely grows does not have a shadow and does not grow fruit?
When I live I cry, If you don't kill me I'll die.
It's equally comfortable in an orchestra and a geometry textbook. What is it?
A precious fluid, thicker than water.
Often cooked as fillet, this meat comes from an animal that swims underwater.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?