This example demonstrates a React-based menu system for selecting a pet from a dropdown list, with the chosen value displayed in a large label. It uses React’s `useState` hook to manage the selected value and a custom `Dropdown` component that renders a `<select>` element. The component receives options, an id, the current value, and a change handler, allowing dynamic updates on user selection. The code relies on React 16.9 and ReactDOM to render the UI, with options listed as objects containing value and label pairs. The example shows stateful form interactions in a minimal, unstyled layout.