Answer:
Conclusion.
Step-by-step explanation:
Conclusion can be defined as an ending reached after reasoning or judgment.
In a speech or any piece of writing or presentation, an introduction and conclusion are most important part because an introduction helps the audience to get to know the theme of your speech or presentation, whereas, a conclusion helps the audience to remember the main points of the speech.
To write an effective conclusion it is important not to just summarize the speech but to link all the main points with the examples and the reasoning made in the speech because the audience may not remember whole of the speech but if conclusion is made effective then they will be able to remember what the speaker wanted to convey.
So, the correct answer is the conclusion.