One reason ecosystem stability is important for life-forms because it creates a habitable environment for life-forms to live in. Such stability is important for an adjoining one because it allows the sphere of influence and boundaries to extend beyond its boundaries. This results in impacting changes to adjoining ecosystems. I hope that this is the answer that you were looking for and it has helped you.
Plant parts are flattened and at least some of the original plant material remains. Leaves are often preserved as compressions.
I believe it's a group of organs working together.