15. which of the following human relations skills is most clearly related to communication?

The answer is D. Listening.

Responsibility has basically nothing to do with communication and the others aren't either

compare & contrast informative essay/speech

when speaking or writing for the sole purpose of providing information in order to give audience members a good basis for making a decision, you would present an informative speech or essay.   because you wouldn’t want to be persuading the audience by arguing for one type of exercise over the other, you wouldn’t choose a persuasive/argumentative technique.   to fairly, and without bias, present information about the pros and cons of each type exercise, a compare/contrast, informative speech/essay would be the best bet.

a question like this requires the excerpt to be included in order to answer the question.