The correct answer is D. Remember, the word "aesthetic" means "having a sense of beauty." Thus, the correct answer would involve a sensory detail that provides a sense of beauty. Answer D is correct because the image "a thin, sizzling sound" is not necessary to the passage. The sentence could have ended after the word "rim," and no meaning would have been lost. However, the sensory detail "a thin, sizzling sound" does have a clear aesthetic impact. First, this phrase produces a clear image for the reader to imagine. Second, this phrase sounds beautiful, thanks to the use of alliteration (sizzling sound) and onomatopoeia (the word "sizzling" mimics the sound of the air is making).
