Final answer:
The frame narrative structure reveals that the storyteller was a quiet man that hiked, which may not have been known without this context.
Step-by-step explanation:
The description of the storyteller we might not know if the story was not structured as a frame narrative is that he was a quiet man that hiked (option b). Frame narratives allow for additional context and characterization that might not be possible through a straightforward narrative approach. This extra information is provided by the larger narrative 'frame' which surrounds the embedded story or stories.