Pitifully
The word 'pitifully' in this excerpt is significant because it tells the reader the narrator's feelings towards the girl getting married. Without that word, there would not be the same level of insight or emotion into the narrator's thoughts. the word 'pitiful' has a negative connotation, if you are feeling pity for someone it means you do not think they should be in the situation they are in and wish you could help get them out of it. This tells the reader that the narrator feels the bride is far too young to be getting married and maybe it's something out of her control or that she is being forced into.
The narrator.
The passage never gives the narrator a name, or refers to himself in any given name.
It is true that an interview can be considered a source.
You may get some useful information and data from an interview.
Answer: Using figurative speeches and maintaning curiousity of readers.