The poetic found in the scenario described in these lines is the last one. D: Kenning.
Explanation:
First, let's remember that Kenning is a stylistic device defined as a <u>two-word phrase that is used to describe an object through metaphors.</u> It is a compressed metaphor which meaning is expressed in a few words. In this case, the <em>cordless communicator</em> is an example of <em>Kenning</em>, and that is the poetic found in the scenario described in the lines above.