The poem hello to you is a lullaby and uses repetition and metaphor as the poetic device. Thus, repetition is the poetic structure used in the poem.
A poetic structure is a format that decides the blueprint and the rhyming scheme of the poem that also gives the genre and the meters and the stanzas. The poem in the question uses repetition in its format.
Repetition is the poetic structure and device that include the same phrases and words again and again in the lines and stanzas of the poem. It makes the description a little attentive for the readers to read.
Therefore, repetition is used in the poem.
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