Yoda Response: Certainly, Avi. While I primarily use React for web development, HTML5 plays a crucial role in creating the structure and ensuring a responsive design.

For instance, in one of my projects, I developed a responsive web application using React and HTML5. Here’s how I utilized HTML5:

1. **Semantic HTML**: I used semantic HTML5 elements like `<header>`, `<nav>`, `<section>`, and `<footer>` to create a well-structured and accessible webpage. This not only improved the readability of the code but also enhanced SEO.

2. **Responsive Design**: I employed HTML5 along with CSS3 media queries to ensure the application was responsive across different devices and screen sizes. For example, I used the `<picture>` element to serve different images based on the screen resolution, ensuring optimal performance and visual quality.

3. **Forms and Validation**: I used HTML5 form elements and attributes like `<input type="email">` and `required` to create user-friendly forms with built-in validation, reducing the need for additional JavaScript validation.

4. **JSX in React**: In React, I used JSX to write HTML-like syntax within JavaScript, creating reusable components. These components were then pieced together to form the complete web application. By breaking the UI into functional components, I ensured that the code was modular and maintainable.

One specific example was a subscription form I created for a project. Using HTML5 form elements and React components, I built a responsive and user-friendly form that provided real-time validation feedback to users, enhancing the overall user experience.