The tone, or attitude, is the way the narrator is trying to get across to make you feel. They are trying to show how they are feeling without directly saying it.
A narrator while offering his or her story in a certain tone. A "tone" is the general attitude or character under which the narrator is while telling the story. This attitude could reflect the mental state in which the narrator is at that moment.
There are some tones that have a better fit according to the genre of the story. A story of war would probably have an energetic tone, whereas a tragedy would have a solemn tone.
An advertisement for a car is to persuade A comedian’s blog is to entertain A recipe for a pasta dish is to instruct A nutritional label on food packaging is to inform
"We noticed the CAMPING club had set up their tents nearby" This is the answer because in the other sentences it is being used solely as a verb. Where as in the first sentence it is being used as a noun for the the club.