This example shows an interactive pet-selection menu built with React. A dropdown list displays six animal options, and selecting one updates the displayed choice in real time. The app uses React’s `useState` hook to manage the selected value, passing it to a custom `Dropdown` component that renders a native `<select>` element. Styling uses large fonts, and the code relies on React 16.9 and ReactDOM to mount the component into the page’s root div.