Refrain "Where did my childhood go?" Refrain is a set of words ,or a group of lines that appear in the poem where a poem divides into different sections.In the same manner here "where did my childhood go?" is the line which divide the poem in different stanzas. I think the answer is personification.

Antihesis is where two opposite words are used together in a sentence in a poem where did the poet use it?

Introduction:
In the poem 'Childhood', the refrain literary device is used. The refrain is a repeated line or phrase that appears at regular intervals throughout a poem or song. It serves to emphasize a particular theme or idea and creates a sense of rhythm and unity in the piece.

Explanation:
The refrain in the poem 'Childhood' is the line "Where did my childhood go?" This line is repeated several times throughout the poem, highlighting the speaker's nostalgic longing for their lost childhood and the passing of time.

Importance of the refrain:
The refrain "Where did my childhood go?" acts as a central theme in the poem, emphasizing the speaker's reflection on their past and the fleeting nature of childhood. It serves to evoke a sense of nostalgia and melancholy, as the speaker mourns the loss of their carefree and innocent days.

Rhythm and unity:
The repetition of the refrain creates a rhythmic quality in the poem. The regular recurrence of the line adds a musicality to the piece, making it more engaging and memorable for the reader. Additionally, the repeated use of the refrain helps to establish a sense of unity and coherence in the poem, as it ties together the various stanzas and thoughts.

Emphasis on the theme:
The refrain "Where did my childhood go?" underscores the main theme of the poem - the passage of time and the loss of innocence. By repeating this line, the poet draws attention to the transitory nature of childhood and the speaker's longing to recapture the joy and simplicity of that time. It creates a poignant and reflective tone throughout the poem.

Conclusion:
The refrain "Where did my childhood go?" in the poem 'Childhood' is a powerful literary device that enhances the overall impact and meaning of the poem. Its repetition emphasizes the theme of lost innocence and the passage of time, while also adding rhythm and unity to the piece.