Which theme predominates in the poem "Grass" by Carl Sandburg?

In "Grass" by Carl Sandburg, the predominant theme is indeed war and its aftermath. The poem reflects on the impact of war, particularly how the grass symbolizes both the passage of time and nature's ability to cover the scars of conflict. Sandburg uses grass as a powerful metaphor for the way nature reclaims the land, hiding the remnants of battles fought and the lives lost in wars. The repeated call to "pile the bodies high" serves as a stark reminder of the human cost of war, emphasizing the brutality of conflict while also indicating that life — represented by grass — continues despite the destruction. This connection to war and its aftermath is central to the poem's message, making it the most fitting choice among the themes presented. The other themes, while significant in their own right, do not capture the essence of Sandburg’s exploration of war's impact on memory and the environment.