Final answer:
The image of 'echo chambers' in paragraph 10 contributes to Sunstein's thesis by highlighting the negative consequences of surrounding oneself with like-minded individuals and limiting exposure to diverse perspectives.
Step-by-step explanation:
In Sunstein's thesis, the image of “echo chambers” in paragraph 10 contributes to the idea that people are increasingly surrounding themselves with like-minded individuals and information sources, which reinforces their existing beliefs and limits exposure to diverse perspectives. This phenomenon leads to political polarization and the suppression of dissenting opinions. By using the term “echo chambers,” Sunstein emphasizes the negative consequences of this behavior on public discourse and the need for a more open and inclusive exchange of ideas.