This example shows a React-based menu system for selecting a pet from a dropdown list, using the `useState` hook to track the currently chosen value and the `Dropdown` component to render the select element. The code relies on React 17 and ReactDOM for component rendering, with options defined as an array of value-label pairs. As users change the selection, the `onSelectedValueChange` callback updates the displayed state, demonstrating controlled form inputs within a React application.