Read this excerpt from White Fang.

But suddenly, with remarkable swiftness, Lip-lip leaped in, delivering a slashing snap, and leaped away again. The snap had taken effect on the shoulder that had been hurt by the lynx and that was still sore deep down near the bone. The surprise and hurt of it brought a yelp out of White Fang; but the next moment, in a rush of anger, he was upon Lip-lip and snapping viciously.

White Fang’s character is developed in the excerpt through

a plot conflict.
the narrator’s opinion.
interaction with the setting.
the characters’ thoughts.