If you mean how does use of questions contribute to the development of ideas in general, then it makes the raiders think as they read.
Grendel comes to the mead hall and engages in a fight with Beowulf
hope this helps:)
Based on this excerpt, the author would argue that life in the mountains simple and satisfying. The idyllic way they describe the setting, with gentle wind and beautiful light of the sun shows that it would be a breathtaking place to live. Also, the emotional attachment of the main character to living in the mountains shows that the author thinks it is a desirable scenario.