Which fact does the historical context reveal about the setting? The route to the gold fields was very challenging. Few people were headed to the gold fields. The route to the gold fields was organized and orderly. People risked life and limb to find gold in Alaska.

To show the animals increasing resistance to napoleon

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,

moon-letters were a method of writing invented by the dwarves. moon-letters were ordinary runes, but written in such a way that they could only be read when the light of the moon shone behind the writing. some moon-letters could be read by any moonlight, but it was possible to make the writing even more secret. more sophisticated moon-letters could only be read by the light of the same shape of moon, or at the same time of year, as when they were written. hope this !