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
Whose poem is titled "Leaving the University Gym"?
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Whose poem is titled "The Quotations of Bone"?
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Which song contains the line "go eat worms"?
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In Shel Silverstein's poem, where does the grass grows soft and white?
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Who wrote the poem "Life Is Fine"?
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What did Yankee Doodle ride to town on?
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In 'Little Bunny FooFoo', what was the bunny hopping through?
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Hans Christian Andersen's "The Nightingale" is set in what country?
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