Answer:
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
I break down buildings, I crumble mountains but you can't see me. What am I?
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
I keep growing and am practically indestructible. I get eaten, but always come back. I survive cold and lie everywhere. You see me everyday. What am I?
I move without wings, between silken strings. I leave as you find my substance behind. What am I?
The answer I give is yes, but what I mean is no. What was the question?