Answer:
D. inclusion.
Explanation:
The narrator puts himself as part of the story. When a narrator describes situations in the story where he puts himself as an observer, this narrator ends up promoting a sense of inclusion. This is because, by observing the scene and describing it, the author is included in the story and becomes part of that narrative as a being that is included in the plot and is observing everything inside the plot.
'over the summer...' is right