Answer:
The example would show how infrared technology is relevant to everyday life.
Step-by-step explanation:
When Josh was showing the use of infrared technology as a device used in scientific and military analysis, the public could become discouraged and stop paying attention to the lecture, as it seemed that this type of technology was irrelevant to them. For this reason, Josh decided to show that infrared technology is more common than it appears, presenting an example that all members of the public knew. In this way, Josh brings the audience closer to the subject presented, arouses interest and shows relevance.