This example demonstrates a simple React dropdown menu for selecting a pet, with the chosen option displayed as the selected value. The app uses `useState` to manage the selected pet’s value and passes it to a reusable `Dropdown` component, which renders a native `<select>` element. The component receives `options`, `idName`, `selectedValue`, and an `onValueChange` callback, updating the state when the user changes the selection. Built with React 18 and `createRoot`, the menu lists five pets, defaulting to “cat,” and highlights the active option in the dropdown.