Which of the following is NOT a symbol in the poem? the aquarium
small town New England greens
Colonel Shaw
a Mosler safe

Small town New England greens

Explanation:

Symbolism is the literary device used by authors and writers to represent an idea or theme in their works. They use images and indirect suggestive forms to show their expressions and emotions, ideas, and feelings. In the poem "For the Union Dead" by Robert Lowell, the poet uses a lot of symbolism in his whole poem. The Mosler safe, the aquarium, Colonel Shaw, etc all stand for what was in the past. The aquarium represents the "black school children", while Colonel Shaw was a famous soldier during the war who was buried along with his black comrades, representing death and sacrifice. The Mosler Safe is a representation of the present-day technology responsible for the bombings, a reference to the bombing of Hiroshima and also showing the horrific details of the war. The small-town New England greens did not have any symbolic references in the poem.

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the black night was split open like the coconut

it says that it was totally black in the mind of a person but suddenly his mind opened like a coconut with the sweetness of the coconut water and the white color inside it.

or

the black night was thrown like a coconut and it slit apart with its sweet water coming out .