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 poem "Baa Baa Black Sheep", who doesn't the black sheep have a bag of wool for?
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What do you mark the cake with in the nursery rhyme "Pat-a-Cake"?
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Who wrote the poem "Armies in the Fire"?
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In "Baa, Baa, Black Sheep", who will not be getting a bag of wool?
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In the fairy tale "Hansel and Gretel", who had a house made from gingerbread?
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Which poet wrote the poem "The Flowers"?
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How did the poet Robert Frost's son die?
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What did "Betty Botter" need for her batter?
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