In Chapter 7 of "Call of the Wild" it takes place in the wilderness. The exposition in Chapter 7 of Jack London's "Call of the Wild" could actually be many things, I believe that main exposition of the story is the rumor of a lost mine that is full of gold, the team desires to find the gold.
I believe the rising action in Chapter 7 "Call of the Wild" first began with Buck hearing howling noises from the forest and running towards it, than Buck finds a timber wolf and they become friends, than Buck is torn between hunting on his own or being a sled dog, than Buck become "a thing of the wild'', than he finds the dogs and owners killed by the Yeehats, finally Buck kills several Yehhats and they immigrate.
In chapter 7 of "Call of the Wild" the climax is Buck finds Jhon Thorton dead as he was killed by the Yeehats. Buck finds himself mourning over Jhon Thortons death but Buck no longer feels like a pet or a sled dog. Buck is know a primordial beast.
Theme Tone and Mood
I believe the the falling action in chapter 7's ''Call of the Wild" is when Buck began to hear the wolf cries again and Buck than began to follow the cries of a wolf, Buck's desire to find the wolf cry than put him in a wolf pack.
In Chapter 7's "Call of the Wild" the resolution of the story is when killed some of the Yeehats in-which they now fear Buck and know him as the ghost dog and finally Buck returns to the valley mourning over Thortons death before he immigrates with the wolf pack.
After all the events leading to Thorton's death and Buck finding a wolf pack the theme of the story I feel is about change who you really are within such as how Buck went through so much and found the primordial beast within. The tone and mood of the story in chapter 7 is you get a really sad vibe, Buck mourns over Jhons death and even visits the place he dies annualy.