“ The Frog Comes On Little Cat Feet “ in these lines , the author is employing

Metaphor

Explanation:

The author seems to be making a comparison to two different things in order to describe the nature of (this) frog's movement/behavior. It is, of course, too absurd to be literal. It isn't a simile because it doesn't use any clear connection words such as "like" or "as" but rather relies on the implication of the reader.

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