I remember when I was in kindergarten, my mother took me out for a walk every day. We walked on the tree-lined path while listening to the crisp and sweet songs of the lovely birds. From time to time, colorful flower clusters would appear in our sights. Here, it is the icing on the cake for this natural beauty. But today, my mother and I walked on that path again. With joy, I looked for my old friends, but we reached the end of the road and did not hear a bird. The screams, not to mention the colorful flower clusters, even the most inconspicuous and tenacious grass disappeared from our sight