Using news magazines like Time or Newsweek in a speech is an example of:

Using news magazines like Time or Newsweek in a speech exemplifies utilizing secondary source materials because these publications analyze, report, and provide commentary on information gathered from primary sources. Secondary sources interpret and synthesize primary data or original research findings. In the context of public speaking, incorporating secondary sources like news magazines can enhance credibility and provide context, as they aggregate and present information from various primary sources while also possibly including expert analysis. This approach allows the speaker to draw from a broad range of reported events, trends, and expert opinions without directly engaging the raw data or firsthand accounts themselves.