His article was included in a course catalog guide for a university. What is the best way to describe the author's purpose in writing this piece? to inform readers with a summary about the field of herpetology to amuse readers with a brief anecdote about "snake doctors" to persuade readers to take science courses in herpetology to describe the difference between reptiles and amphibians

to inform readers with a summary about the field of herpetology

While writing a persuasive piece, which appeal should you use to get your audience to believe and trust you?

The responder's answer would be ethos.

Ethos speaks of the character's credibility or the persuader's credibility of what he or she is asserting and positing, is it strong and bold or just a mere existent elaboration. Thus follows the characteristics on tone, logos and pathos. Ethos is one key to trusting since it presents one's consistency and as a reliable speaker.