Answer:
You heard me before and then again. Afterward I die until you call me again.
I go up, let out a load and then go back down. What am I?
I am needed for most animals and hardcover books
I am a nut with a hole
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
The more that there is of this, the less you see. What is it?