Answer:
I come without being fetched at night, hide away as soon as daylight strikes. Although I may look small, I am much mightier than what you can imagine. What am I?
I am what brings things together. Without me everything you see would be a total mass or debris everywhere. What am I?
What is harder to catch the faster you run?
I am easy to waste and unstoppable
Bright as diamonds, loud as thunder, never still, a thing of wonder. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.