Answer:
purpose of your speech
main divisions of your speech
supporting materials and evidence
Step-by-step explanation:
The preliminary outline of a speech is a sketch that guides the speaker and helps him stay on track as he develops his speech. In order to generate the first outline, the speaker must have a clear purpose. This factor helps the speaker to know why he is writing and helps him maintain that purpose throughout the speech.
Next, the main divisions of the speech comprising of introduction, headings and conclusion are determined. It would also be wise for the speaker to obtain supporting materials and evidence that will fill up the different divisions of the speech.