This example demonstrates a React-based dropdown menu for selecting a pet, with the current choice (hamster by default) displayed in a select element. It uses the React `useState` hook to manage the selected value and a reusable `Dropdown` component that renders options via `.map()`. The code loads React 18.3.1, ReactDOM, and D3 v7.9.0 from CDNs, though D3 is not directly used in the visible logic. The interface is styled with inline CSS for larger label and select text.