The word narrative comes from the Latin word narrare, which means, "to tell."
"Narratives through the means of oral storytelling have been part of every culture of humans that have ever had verbal communication. Narratives through the means of oral storytelling were important to reinforce moral lessons for a culture, pass down history and traditions, and shared values and norms. Narratives were also a means of entertainment and have helped people in every age develop a sense of identity, deepen their understanding of human psychology, and make meaning of life." http://www.literarydevices.com/narrative/
The Tone is the manner in which the author expresses himself or herself.
Tone conveys the emotions, underlying feelings and attitude of the writer. This is important through a choice of vocabulary, especially in direct speech, sentence length and punctuation.
The tone may be described as friendly, sharp, sarcastic, ironic, angry, humorous or condescending. (What tone would the author use if he were to read his work out loud?)
Mood/atmosphere is the pervading feeling that the reader experiences.
It is created by the author through various language devices and through his tone.