Final answer:
An example of character vs. character conflict in The Strange Case of Dr. Jekyll and Mr. Hyde would be a direct confrontation or oppositional interaction between two characters, such as Mr. Utterson or Sir Danvers Carew dealing with the enigmatic and malignant Mr. Hyde.
Step-by-step explanation:
To identify an excerpt from chapter 3 of The Strange Case of Dr. Jekyll and Mr. Hyde that illustrates a character vs. character conflict, we would need to analyze interactions between characters where there is a clear opposition or antagonism. A prime example might involve a direct confrontation between Dr. Jekyll and Mr. Hyde, showcasing their conflicting interests, personalities, or actions. However, since Dr. Jekyll and Mr. Hyde are the same person, a more traditional conflict in the narrative would involve another character like Mr. Utterson or Sir Danvers Carew encountering or attempting to understand Mr. Hyde's mysterious and malignant influence. The purpose and theme of the narrative are deeply intertwined with conflicts; these not only drive the plot but also aid in developing the characters and heightening suspense throughout the story.