How does the speech's final sentence connect to the first?
the first sentence makes an emotional appeal; the final sentence makes an ethical appeal.
the first sentence acknowledges the speaker's mentor; the final sentence says he will no longer fight with that mentor.
the first sentence describes the speaker's longtime foe; the final sentence describes their agreement to no longer do battle.
the first sentence acknowledges to whom the speaker is surrendering; the final sentence formally states that surrender.

The speech's final sentence connects to the first by

The first sentence makes an emotional appeal; the final sentence makes an ethical appeal.  

Explanation:

For academic writing, business writing and also writing and delivering a speech, what you write and say must be clear. There are certain rules you have to follow. Make sure that you tell the audience what the central idea is. This is done in your thesis statement or speech intro which is the first sentence. It's a very general sentence that introduces the topic of the paragraph, nothing else! In other words adding details and particular key info in this sentence is not ideal because all the details come after.  

The final sentence must directly relate back to the main idea and in this sentence it would also not be ideal to include key details from the story. All key details and plot take place in the body paragraph. There's nothing wrong with making an emotional appeal as an intro and then end with an ethical appeal as a closing sentence.

dramatic irony occurs when the reader/audience knows more about a character's situation than the character does. the one main effect is that it gives the reader a sense of superiority, or detached superiority. the reader not only seemingly discovers what is revealed, but feels superior for doing so.