This example demonstrates how to build interactive dropdown menus in React. It renders a pet selector with options for goldfish, dog, cat, and parrot, using React’s `useState` hook to track the selected value and update the UI on change. The `Dropdown` component maps over a hardcoded options array, creating `<select>` and `<option>` elements, with an initial value set to “cat.” The code uses React 16.9 and ReactDOM from unpkg, with the dropdown styled via CSS in the HTML file.