### Q1: What is the primary purpose of using semantic HTML elements in web development?  
### Q2: How does the structure of an HTML document begin, and what are the main sections it contains?  
### Q3: What are some best practices for ensuring that HTML elements are properly nested within a document?  
### Q4: How can the use of semantic HTML enhance the search engine optimization (SEO) of a web page?  
### Q5: What is the significance of the `<head>` section in an HTML document, and what type of content does it typically contain?  
### Q6: In what scenarios might you choose to use ARIA roles and properties, and what precautions should be taken?  
### Q7: How can you explain the importance of using alt text for images to someone unfamiliar with web accessibility?  
### Q8: What strategies can you employ to ensure that your web pages are both functionally and visually appealing?  
### Q9: How would you communicate the benefits of proper heading hierarchy to a team member working on web content?