Answer:
informal
Step-by-step explanation:
John Hilton was an American journalist. At the beginning of World War II he made a radio broadcast where he spoke informally about aspects of war, how it affects citizens, and other matters that were very important to discuss at that time. Hilton decided to use an informal tone because he believed it would attract people's attention and make them more comfortable discussing such unpleasant subjects. Moreover, he believed that with an informal tone it would be easier for people to understand and discuss these issues with each other.