A.Spectators and runners both make the race special.
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.
An example of a synthesis reaction is the combination of sodium and chlorine to produce sodium chloride.