The poets smile at the end of the poem signifies:

At the end of My Mother at Sixty-six, the poet’s smile signifies a moment of emotional resilience and an attempt to mask her deep sadness. As she bids farewell to her mother, the smile is a fleeting gesture of reassurance, both for her mother and herself. Despite the overwhelming fear and sorrow she feels at the thought of losing her mother, the smile reflects a need to conceal her true emotions and provide comfort in the face of inevitable separation. It suggests the poet’s inner conflict between love and the painful acceptance of aging and mortality.

This question related to Poem 1 English Flamingo Class 12th NCERT.
From the Poem 1. My Mother at Sixty six.
Give answer according to your understanding.