1) you might read about losing a favorite doll along the way
2) what the narrator was thinking and feeling during important events in the story 
3) It can help you understand the characters better. 
4) a more objective and reliable understanding of events 
5) introductory words
6) that they're about to hear an example of the idea in the previous sentence 
7) that it's a sentence that will show them a difference 
8) a comma 
9) For example, they may try to explain why they chose to be pirates.