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 what country did Robert Frost's work first become famous?
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Which boy fails to save the Ice-Maiden in a famous tale by Hans Christian Andersen?
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In the nursery rhyme "Pop! Goes the Weasel", how much does a spool of thread cost?
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In the "Aesop's Fable", who did the Fox trick into dropping a piece of meat?
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What writer was once fired from a newspaper job because of a poem?
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In "This Little Piggy", what did the second little piggy do?
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How many fiddlers did Old King Cole call for?
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Who does an apple a day keep away?
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