Explanation:
Impromptu speaking involves delivering a message on the spur of the moment, as when someone is asked to “say a few words.” Extemporaneous speaking consists of delivering a speech in a conversational fashion using notes. This is the style most speeches call for.
The most common type of speech is a prepared speech. For a prepared speech, the speaker was been given the topic in advance, had time to do background research on it, and has practiced delivering the speech. This type of speech may be used when giving a presentation or speaking in a business meeting.
