How can I customize the fallback UI rendered by an Error Boundary?

You can customize the fallback UI using the `fallback` prop in the `ErrorBoundary` component. This prop accepts a React component. The component is rendered while the error is being processed. You can pass props to the `fallback` component to make it more dynamic and interactive. You can also use conditional rendering within the fallback component to display different UI elements based on the type of error that occurred.