B, he is showing he knows he's getting better becoming more hopeful
This isn't a great story, to be quite honest. The story focuses less on the ways man used to start fires and more on the ways that nature started fires independently of humans.
That being said, it would seem as though the author is trying to express the fragility of fire early on, and it does seem as though he/she is saying that early on, humans just found a small amount of fire from a really dangerous origin to use as a kindling.
For sure, your answer should come from the second paragraph, which is the paragraph describing early kindling methods.
Answer:
Boo Radley
Boo Radley saves Jem and Scout and it is believed that he kills Ewell with the knife. Heck Tate, the sheriff, puts in the official report that Bob Ewell fell on his own knife and died after lying under a tree for 45 minutes.
