I believe that the best answer for this question is "repetition of key words." Here, the speaker is repeating "don't listen," and "frighten"/"scare," which are synonymous with each other. The speaker is driving the point home and adding emphasis by using repetition to support his point. It cannot be figurative language, because that suggests that the author is using metaphors or other symbolic language. Varying pitch can also be ruled out because of a lack of tone change in the second statement. Parallel structure can also be ruled out because the sentences are structured differently. Hope this helps.
