Final answer:
The narrator's box of candies is a memento of Mr. Pirzada, symbolizing their bond and the cultural and political context of their relationship during the 1971 Bangladesh Liberation War.
Step-by-step explanation:
The box that the narrator stores Mr. Pirzada's candy in is her direct memento of Mr. Pirzada himself. The candy from Mr. Pirzada was given to her during the time he spent with her family while being far from his own during the 1971 Bangladesh Liberation War.
This is a representation of the bond they formed and the concern he showed towards her family, particularly the well-being of the narrator and her sisters.
The candies are a symbol of Mr. Pirzada's presence and the cultural connection they shared. It is through these candies that the narrator remembers the political turmoil of the time and Mr. Pirzada's anxieties about his family back home.