Answer:
I am what bring things together. Without me everything you see would be a total mass or debris everywhere.
I am brown and sticky
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
Only one color, but not one size, stuck at the bottom, yet easily flies. Present in sun, but not in rain, doing no harm, and feeling no pain. What am I?
I make things short but I am pretty long myself
I will disappear every time you say my name.