Final answer:
The synonym for 'advocating' in this context is 'supporting,' as it pertains to the way writers use evidence to bolster their arguments.
Step-by-step explanation:
The best synonym for advocating as used in paragraph 3 is supporting. The context seems to pertain to how writers construct their arguments, by employing techniques such as repetition, rhetorical questions, and evidence synthesis to strengthen their points. When writers are advocating for a particular view, they provide grounded justification for their claims using various forms of evidence, like quoting experts, relating narratives, and presenting factual data, all of which serve to bolster their position. The process of advocacy in writing is thus not merely about stating opinions but involves actively promoting and supporting a stand with substantial, credible, and well-organized information.