Final answer:
In Phillip Agnew's speech, a tone shift is often marked by changes in word choice, sentence structure, or the introduction of a new aspect of his argument, similar to literary examples provided.
Step-by-step explanation:
The tone shift in Phillip Agnew's speech can be identified through various literary techniques and the context of the speech itself. A tone shift typically occurs when the speaker changes their emotional stance or approach to the material, which can be indicated by a change in word choice, sentence structure, or other rhetorical strategies.
In the given examples from various texts, we see similar instances of transition between paragraphs, pathos, and shifts in perspective, which suggest that a tone shift in Agnew's speech could be signaled in similar ways—possibly through a distinct phrase that introduces a new facet of his argument, a change in the emotional appeal, or a shift from presenting facts to asking rhetorical questions.