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There are several ways to utilize Error boundaries in functional React components, including:

1. Using the built-in ErrorBoundary component: React provides a built-in ErrorBoundary component that you can use to catch errors in your application. You can wrap your functional components in the ErrorBoundary component to catch any errors that occur.

2. Creating your own Error boundary component: You can create your own custom Error boundary component that takes in a set of props and returns a React component. This allows you to define the behavior of the Error boundary in a way that makes sense for your specific use case.

3. Using the try-catch block: In your functional component, you can use a try-catch block to catch any errors that occur within the component's code. You can then handle the error by displaying an error message, logging the error, or taking any other necessary actions.

4. Using higher-order components: You can also use higher-order components (HOCs) to wrap your functional components and catch errors. HOCs are functions that take in a component and return a new component with additional functionality. In this case, you can create an HOC that wraps your functional component in an Error boundary component.