The title of the poem "My Mother at Sixty Six" is significant in conveying the central theme of the poem. The correct answer is option A, which suggests that the poem expresses the poet's fear of losing her old mother. Let us understand this in detail:

Title:

- The title of the poem "My Mother at Sixty Six" indicates that the poem is about the poet's mother who has reached the age of sixty-six. This age is significant as it suggests that the mother is old and nearing the end of her life.

Theme:

- The central theme of the poem is the poet's fear of losing her mother. The poem describes the poet's emotions as she travels with her mother in a car. She is worried about her mother's age and health and fears that she might lose her soon.
- The poem also highlights the poet's realization of her own mortality. She understands that one day she too will grow old and die, just like her mother.
- The poem also portrays the close bond between the mother and daughter. The poet feels a deep sense of love and respect for her mother, and the poem is a tribute to her mother's life.

Emotions and Imagery:

- The poet uses various emotions and imagery to convey her feelings about her mother. The poem is written in a reflective and nostalgic tone, which emphasizes the poet's emotional state.
- The imagery used in the poem is significant in conveying the central theme. The road journey, the passing landscape, and the sunset symbolize the passage of time and the inevitability of death. The mother's frailty and vulnerability are also emphasized through the imagery, as she falls asleep in the car.

Conclusion:

- In conclusion, the title "My Mother at Sixty Six" is significant in conveying the central theme of the poem. It suggests that the poem is about the poet's mother who has reached an old age and is nearing the end of her life. The poem expresses the poet's emotions, fears, and realization of her own mortality. It is a tribute to the mother-daughter bond and the love and respect the poet feels for her mother.