the passage on page 93 "city boys and there city ways" mainly shows that

Brian sees himself changing in nature and shedding his old urban habbits and identity. Brian is becomming a new person, much more hardy and attune to the elements, Brian has adjusted to his new life, and can look back on the person he was before the plane crash with some distance. While he investigates the turtle tracks, Brian demonstrates his consciousness of his urban habits...... The author continues, "He smiled. City boy, he thought. Oh, you city boy with your city ways—he made a mirror in his mind, a mirror of himself, and saw how he must look. City boy with your city ways sitting in the sand trying to read the tracks and not knowing, not understanding."