Various Stump Shapes, in the mountain
A stump is a tree cut down, and only roots stuck in the ground remain. The stump may reveal an age frame for the tree's age, and researching this is called Dendrochronology.
Stumps are sometimes able to regenerate into new trees. Often, a deciduous tree that has been cut will re-sprout in multiple places around the edge of the stumps or from the roots.
I don't know all the stories about why it was cut, but I hope these trees can get back to life.