It’s B because I learned this in 6th grade
Answer: No. It isn't an example of ethos.
Explanation:
Ethos refers to an argument that's based on the credibility of the person that's making the argument.
Ethos simply means establishing the authority to speak on a particular object subject. It's the persuasion and the argument whereby the knowledge, good moral character and the credibility of the speaker is shown.
In this case, the example given isn't an example of ethos because dentists in this case is a broad term and therefore does not give credibility from a particular dentist or probably a dental research.
Answer:
the man builds an emergency fire after he steps into a small spring under the snow and gets wet halfway to his knees. Jack London's short story exemplifies the theory of naturalism which holds that man is subject to natural forces beyond his control.