Answer:
I go in hard come out soft. Blow me hard and I’ll make a pop.
What is harder to catch the faster you run?
I make everyone blind. You can't see me but I will always come back for you. What am I?
you can throw me away but I will always be coming back
I am needed for most animals and hardcover books. What am I?
Give it food and it will live, give it water and it will die.