I think its informal because cool isn't a formal word
I think that the way that our parents or grandparents personality can relate to characters in the classic texts
It is that it is unrealistic to believe that wars are not deadly.
Answer:
The example would show how infrared technology is relevant to everyday life.
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.