In John McCrae's poem "In Flanders Fields," one of the key elements that supports the conclusion that the separation between life and death is central to its theme is the juxtaposition of the blooming poppies and the fallen soldiers. The imagery of the poppies growing amidst the graves symbolizes the continuity of life even in the face of death, highlighting the connection between the living and the dead.
Additionally, the poem's structure, especially in lines where the dead soldiers call upon the living to continue their fight, reinforces the theme of the struggle between life and death. The recurring motif of remembrance, as the living are urged to take up the mantle in honor of those who have died, illustrates the idea that life persists through the memories and sacrifices of the deceased. This contrast between the vibrant life represented by the poppies and the somber reality of death creates a powerful commentary on the impact of war and the lingering effects it has on both the living and the dead.