8. Fill in the summary

"On Killing a Tree" is a poem written by . Being an environmentalist, he opposes the cutting of trees and uses  to explain the same in his poetry. He describes in detail that it takes a lot of to kill a tree, that has taken years of nurturing from the earth. A simple  of the knife cannot kill a tree, nor can the hacking and chopping. The cut trees can  by themselves and sprout  again. If left unchecked, it can even grow back to its . To kill a tree, one must pull out the roots that are  to the earth. The  are the most powerful part of the tree, which has been hidden inside the ground for many years - it has to be pulled out . Then it is only a matter of and choking in the sun and air. It starts browning, hardening and twisting - then it finally down, and the tree is eventually killed.