Tone is 'the attitude that is conveyed by the narrator of a story'. A reader can be persuaded by a writer's use of tone particularly if it matches the readers own 'feelings' on the subject.
For example in Mein Kampf Hitler used a very superior tone - which matched the sentiments of the general population of Germany at the time.
Only one person stayed calm: The guide. This is the correct answer
Answer:
that they thought was the end of the world