Final answer:
The description of poppies and rows of crosses in the poem indicates that the setting is a cemetery, most likely during or after World War I.
Step-by-step explanation:
The description of poppies and rows of crosses in the poem “In Flanders Fields” tells us that the setting of the poem is a cemetery. The mention of poppies blowing in the fields and crosses row on row indicate that this place is a place of remembrance for fallen soldiers. The poem is set during or after World War I, as it is inspired by the war and the author's personal experiences during that time.
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