<span>Long after the world to which it belonged has vanished, a habit of thought will live on, indelibly imprinted upon a race or nation, like the footprint of some extinct beast or bird upon a piece of stone.
The word indelibly refers to the anything that is impossible to remove or forget. It is the mark that cannot be erased.</span>
None of these are correct, phyll, is most cases, means leaf. However, it is the suffix of chlorophyll, which is a green pigment in most plants. With this being said, I would go with green.
Hope this helps!
1. look over it quickly to get a sense of its contents.