Answer: Credibility
Explanation:
Credibility refers to a trait of being trustworthy. If you deliver a speech to the audience they need to trust you in order to believe , the reason why credibility is crucial. Credibility depends on how the audience perceive you in terms of your competence and character.
Audience has to believe you are actual competent in whatever topic you are delivering so that they can believe you are capable of making a logical and valid argument
Credibility can be achieved through referring to your previous achievement and expertise in that topic and sometimes credibility is based on the reputation you have amongst your audience.
If you don't have a great reputation audience are less likely to believe what you say.
Types of Credibility
There are three types of credibility:
Initial
Derived
Terminal
Initial credibility refers to how you introduce your speech , this is only driven by the reputation that you have and your credentials as long the audience know about these , you already have a reputation as you begin the speech.
Derived credibility is the credibility that you obtain during the delivery of your speech.The level of the speaker's professionalism is what get them this credibility.
This means it is derived from the speech that the speaker delivers. If people don't know the speaker's reputation or credentials , this means the speaker doesn't have an initial credibility this one is crucial to obtain.
Terminal credibility is the credibility, this is the lasting impression that the speaker gives at the end of his or her speech.