Answer:
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 am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
Travel a mile and I will change, travel a million and I will end as I started. What am I?
Although I am still, in families I run. I continue to live on in a living one. As one continues to draw breath, I will not rust. However, when one stops drawing breath, I will become mere dust. What am I?
It weighs next to nothing but no one can hold it for long. What is it?