Answer: D. destruction caused by war
This image shows the life of soldiers in the trenches during WWI, or the Great War. The war was particularly destructive because of the stalemate that trench warfare caused. In the painting, we can see the destruction that surrounds the trenches. There is no vegetation, and the trees have all been destroyed. The bleakness of the scenery contrasts with the brightness and beauty of the sky. It shows us the destruction and hopelessness of war.
