This example demonstrates a React dropdown menu that manages its own selection state. The page renders a large "Choose a pet" label alongside a select element populated with five pet options, defaulting to "parrot." The `Dropdown` component receives the options, a selected value, and a change handler, while the parent `App` component uses React's `useState` hook to track the current selection and pass the updated value back through `onSelectedValueChange`. The code uses React 16.9 and ReactDOM, with inline styling for oversized text.