Final answer:
The part not included in the message planning process is 'where to sit if you're the main speaker.' Message planning involves identifying the purpose, understanding the audience, and determining the content of the message.
Step-by-step explanation:
The part of the message planning process that is NOT included is b. where to sit if you're the main speaker. When planning a message, it is essential to identify the purpose of the communication, determine the intended audience, and determine the content of the communication. The physical seating arrangement is typically not a core part of constructing the message itself but may be considered in the overall presentation or delivery strategy.
To define your purpose effectively in message planning, it is vital to know your audience and what you aim to convey to them, which helps in creating compelling content. In drafting an informative speech, you need to create a purpose statement, declare your objectives, and shape your narrative considering the rhetorical situation consisting of audience, purpose, stance, context, and culture. Once you have answered these considerations, you can then determine your stance or claim and strategize on how to structure your project and which media or modes to employ for effective communication.