Final answer:
The propaganda technique that uses well-known personalities to associate their glamour with a product or cause is known as 'Testimonials'.
Step-by-step explanation:
The propaganda technique that involves using well-known personalities to evoke a connection to their glamour and prestige is known as Testimonials. This approach taps into the ethos element, by leveraging the reputation and character of celebrities or respected figures to promote a specific idea, product, or cause. It's common to see testimonials used during war times or crisis situations to drum up support and patriotism.
For example, during World War II, American propaganda often included the involvement of Hollywood stars and other influential figures to bolster morale and gain backing for the war effort. This form of propaganda is seen as identifying with the inspirational or admirable traits of these personalities, potentially influencing public opinion and behavior.