List and explain the three key differences between conversation and public speaking

What will be an ideal response?

• Public speaking is more prepared than conversation. Although there may be times when you are asked to speak on the spur of the moment, you will usually know in advance if you will be expected to give a talk on a specific occasion. A public speaker may spend hours or even days planning and practicing his or her speech.
• Public speaking is more formal than conversation. The slang or casual language that we often use in conversation is not appropriate for most public speaking. Audiences expect speakers to use standard English grammar and vocabulary. The nonverbal communication of public speakers is also more formal than nonverbal behavior in ordinary conversation.
• Public speaking involves more clearly defined roles for the speaker and audience than conversation. During a conversation, there is typically interaction between speaker and listener. But in public speaking, the roles of speaker and audience are more clearly defined and remain stable. Although in some cultures, a call-and-response speaker–audience interaction occurs, audience members rarely interrupt or talk back to speakers during most speeches.