Answer: Extemporaneous
Step-by-step explanation:
Extemporaneous is defined as the speaking mechanism in which the speaker is not much prepared for the subject of the event.This kind of unrehearsed speech is used in competitive speaking events where actual analysis is required.
It consists of shorts notes at times which can be used for glancing while delivering speech and eye contact should be maintained with the audience at certain intervals to have a flow of contact with them.This helps the speaker to know about audience's understanding on the speech's topic.