Final answer:
A process speech is preferred over an expository speech when the intent is to persuade the audience, as it leads them through steps toward a specific action or belief, reflected in a well-defined purpose statement.
Step-by-step explanation:
One reason you may want to develop a process speech instead of an expository speech is if your overall goal is to persuade your audience. A process speech, often used in persuasive speaking, guides the audience through a series of steps to lead them to a particular conclusion or action. In contrast, an expository speech focuses on explaining or describing a topic in a clear and straightforward manner, without necessarily aiming to persuade the audience. When crafting your speech, the first step is to define a purpose statement that succinctly states what you wish to achieve with your audience, keeping them at the center of your presentation.
For example, a purpose statement for a persuasive speech on environmental issues might be, "By the end of this presentation, my audience will feel compelled to reduce their use of disposable plastic." This statement sets the foundation for a speech structure that reinforces the speaker's objective, ensuring the content is engaging and organized in a manner that effectively influences the audience's behavior.