This example shows a pet selector built with React, where a dropdown menu displays six pet options and the current selection is reflected in the interface. It demonstrates how React’s `useState` hook manages the selected value, while a reusable `Dropdown` component (defined with `props` for options, `id`, `selectedValue`, and `onSelectedValueChange`) renders a native `<select>` element. The code uses ReactDOM to mount the app to the `#root` element, with labels and select styled via CSS for large text.