London uses a third-person omniscient point of view in white fang because he wants

In "White Fang," the author uses a third-person omniscient point of view so that the narrator can move from character to character and exhibit their emotions, thoughts and actions. As a result, the reader can get to know each characters' feelings and what drives them to act the way they do.

showing or suffering from nervousness, fear, or a lack of confidence

well there are a bunch of different possibilities so your gonna have to be a bit more specific