What does not contribute to the effectiveness of the delivery of a speech? religion tone clarity organization

The correct answer to the given question above would be the first option: RELIGION. Religion does not contribute to the effectiveness of the delivery of a speech. It has nothing to do with how you convey, or present your speech to your audience. What matters are the tone, clarity and the organization of your ideas or thoughts. 

an insufficiency, shortage, or absence of something required or desired. 2 something that is required but is absent or in short supply.