As an experienced speechwriter, develop a comprehensive and engaging speech outline on the following topic, considering the specified target audience, speech length, and key messages: * Speech Topic: [Describe Speech Topic] * Target Audience: [Describe your target audience] * Speech Length: [Approximate length in minutes] * Key Messages: [List 3-5 key messages or points to cover] * Speech purpose: [Describe the main objective of your speech, e.g. to inform, persuade, entertain, or inspire your audience] Task Requirements: 1. Conduct research: Research your topic thoroughly to gather relevant information and supporting evidence. 2. Understand the speech topic, target audience, and perfect length based on the target audience. 3. Identify the main points that you want to convey in your speech, based on your research. 4. Develop a well-structured and coherent speech outline that effectively covers the key messages. 5. Create an engaging introduction that captures the audience's attention and sets the tone for the speech. 6. Organize the key messages into clear, logical sections, ensuring smooth transitions between points. 7. Craft a memorable conclusion that reinforces the key messages and leaves a lasting impression on the audience. Deliverable: Provide a comprehensive and engaging speech outline that is tailored to the specified speech topic, target audience, length, and key messages. The outline should be well-structured, coherent, and designed to effectively communicate the key messages to the target audience. Format the content in markdown.