Answer:
The narrator tells us that Mark had researched ancient American Indians and that he wanted to write a book on Paleo-American Indians"
"The narrator tells us how stumbling upon an interesting cavern gave the two boys a chance to rediscover a cavern"
Step-by-step explanation:
Stories that are written from a third person's, or narrator's, point of view tell us important details about all the characters in the story. A third person narrator adds suspense to the story as the narrator is able to express the thoughts and actions of both the boys as they explore the cavern. The sentences "The narrator tells us that Mark had researched ancient American Indians and that he wanted to write a book on Paleo-American Indians" and "The narrator tells us how stumbling upon an interesting cavern gave the two boys a chance to rediscover a cavern" describe the point of view reflected in the passage.