This example demonstrates a simple React component for selecting a pet from a dropdown menu, with the chosen value managed through React’s `useState` hook and displayed in the browser console. The `Dropdown` component renders a native HTML `<select>` element, mapping over an array of options to generate `<option>` tags, and invokes a callback `onSelectedValueChange` upon user interaction. The styling is applied via CSS, and ReactDOM renders the App component into the root div. It uses React 17 and D3 v7 for the underlying libraries.