Answer:
There is someone, and there is always another, for without the other, there wouldn't be one
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find
What begins and has no end? What is the ending of all that begins?
I tremble at each breath of air, and yet can heaviest burdens bear.
What can be heard and caught but never seen?
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?