Final answer:
The theme of Sandburg's poem "Grass" is war.
Step-by-step explanation:
The theme of Sandburg's poem "Grass" is war. The poem portrays the grass that grows on the graves of soldiers who have died in war and how it continues to grow and cover up the monuments and memories of the past. The poem reflects on the destructive nature of war and the way it can be forgotten in time.
Learn more about Themes in literature