This example shows a simple pet-selection dropdown menu built with React 16.9. It uses the `useState` hook to track the currently selected value and renders a `<select>` element populated from an in-memory array of pet options. The `Dropdown` component receives an `onSelectedValueChange` callback to update the state, and the current selection is logged to the console. The interface is styled with large fonts and rendered into a root div using `ReactDOM.render`.