A React application demonstrates a controlled dropdown menu for selecting a pet, with the current choice logged to the console. The app uses React's `useState` hook to manage the selected value and renders a reusable `Dropdown` component, which maps over an array of pet options to populate a native HTML `<select>` element. The component receives `options`, an `id`, `selectedValue`, and an `onSelectedValueChange` callback, handling change events to update state. ReactDOM renders the app into a root div, with styling applied through inline CSS.