Answer:
(I've never read this story before, but I will give it my best shot. Hope this helps. :3)
If you were going to chose aspects in the developing story from this section, you should emphasize the mood that the author is giving. Jack London gives off an intense feeling in the story that emphasizes {Insert meaning of story}. He uses phrases and words such as "launched out", "darkness came on" to represent this mood. This can also show a turn of events.