Poetry and Rhymes

When Carl Sandburg says "the fog comes on little cat feet", what poetic device is it?

More Questions from Poetry and Rhymes
In "The Wild Swans", a brave princess rescues how many brothers from a terrible spell?
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What Italian poet wrote "The Divine Comedy"?
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What did Yankee Doodle call the feather he stuck in his cap?
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In "The Farmer In The Dell", what did the cat take?
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In the poem "Baa Baa Black Sheep", who doesn't the black sheep have a bag of wool for?
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What country does the fairy tale "Bluebeard" originate from?
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Where were the stockings hung in "The Night Before Christmas"?
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Where is the baby in 'Rock-a-bye Baby'?
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