Please help me with this English homework

When mrs. jameson says "it (the desert) won't leave you cold," what does she mean?

London includes a quote about john thornton as he is observing hal attempt to motivate the exhausted dogs "it was idle, he knew, to get between a fool and his folly". if the word "idle" is defined as "of no real worth, importance, or significance", what does this statement mean with regard to hal? who is the fool? what is hal's folly? why would john thornton think it of no real worth or useless to intervene?

Can someone “think of a time you overcame a challenge or obstacle. describe the experience in two or three sentences”