Final answer:
The second-person point of view in the excerpts is indicated by the direct use of pronouns “you” and “your”, directly addressing the reader.
Step-by-step explanation:
In the excerpts provided from “The Art of Public Speaking” by Dale Carnegie, the indications that the text is written using second-person point of view include the direct address to the reader with the use of pronouns like you and your.
This narrative approach engages the reader directly and can be seen in sentences such as “As you can see, in the first-person mode, the narrator tells the story directly from his point-of-view.” and “you will probably have noticed that this extract comprises a single, extremely long paragraph...”. These directly involve the reader in the discourse, which is characteristic of the second-person point of view.