Read the following excerpt from an analytical essay on the impact of social media on interpersonal communication:

"In the digital age, the dynamics of personal relationships have shifted dramatically. While social media platforms offer unprecedented connectivity, they simultaneously foster a sense of isolation. The juxtaposition of these outcomes forms a central theme in contemporary sociological discourse. By examining both the positive and negative implications of social media, we can better understand its role in shaping modern communication practices."

In the above excerpt, the author employs a specific organizational structure to facilitate their argument. Which of the following best describes this structure?