The poet's mother was cheerful person.She enjoyed her childhood days with her cousins,which is evident in the photograph of the sea holiday that they had once enjoyed.Even after 20 or 30 years,the poet's mother finds happiness in recalling the past by looking at the photograph of the sea holiday with her cousins .The memory of the holiday made her laugh.She  was not gloomy and unhappy for the golden days that had passed .Her attitude showed that she accepted the losses that came with time .

Hope this information will clear your doubts about the poem A Photograph.
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