What does the cardboard denotes in the poem? Why has this had been use

1.	What does the cardboard denotes in the poem? Why has this had been used?
Answer» ‘Cardboard’ in the poem refers to the photograph. This word has been used because\xa0photograph\xa0is now just a piece of paper with the memory as the poet\'s mother is dead now. It shows that human life is transitory and the cardboard which remains is\xa0memorable\xa0piece of paper.

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