Immutable state handling in React leads to more predictable application behavior. When state is immutable, it becomes easier to reason about how changes to state affect the application's behavior, reducing the risk of unexpected side effects and making the codebase more maintainable.

The Render Props pattern differs from Higher Order Components in that it passes a function as a prop to a component, allowing the component's consumer to render content using that function. In contrast, Higher Order Components are a design pattern that involves wrapping a component to enhance its functionality. Render Props is typically used with functional components, while Higher Order Components can be used with both functional and class-based components.

The useQuery hook provided by Apollo Client in a React application is used to handle asynchronous data fetching and caching. It simplifies the process of making GraphQL queries in React components, managing loading states, and caching the data for optimal performance. While managing component state, defining routing, and creating reusable UI components are important in React, they are not the primary purpose of the useQuery hook.

The primary purpose of a Service Worker in web development is caching and handling network requests. Service Workers enable the creation of Progressive Web Apps (PWAs) by allowing the caching of assets, which can improve website performance, and they can handle network requests even when the user is offline. While they may be used for other purposes like push notifications, their primary role is handling requests and caching resources.

In a small-sized application with minimal state logic and a desire to avoid adding additional libraries, using the React Component State with setState() is a suitable choice. It keeps the application simple and avoids the overhead of external state management solutions like Redux or MobX. Redux Toolkit and React Context API with Hooks are more suitable for larger and complex applications.

A Higher Order Component (HOC) in React primarily serves the purpose of reusing component logic. It allows you to abstract common functionality and share it among multiple components, enhancing code reusability. HOCs are not primarily used for styling, managing state, or organizing Redux store actions, although they can be part of a larger solution.

The useEffect hook in React is used for executing side effects in functional components. Side effects include tasks like data fetching, DOM manipulation, and subscriptions. useEffect allows you to perform these tasks after rendering and to handle cleanup when the component unmounts, ensuring that side effects do not disrupt the component's behavior.

When you want to defer the loading of a component until it's needed, you can use React's Lazy feature. The Lazy function allows you to load components asynchronously, improving the initial loading time of your application. The other options are not specific to deferring component loading in React.

To integrate a native iOS library into a React Native app, you typically use a bridge that connects the native library with the React Native codebase. This allows you to access native functionality while still leveraging the cross-platform capabilities of React Native. Rewriting the entire app in native iOS development tools would negate the benefits of using React Native. Informing the client that it's not possible to integrate native iOS libraries is not accurate, and suggesting a different framework may not be necessary if React Native can meet the requirements.

The fragment keyword in a GraphQL request allows you to split a query into reusable parts. Fragments help in maintaining a clean and organized GraphQL schema by defining reusable selections of fields. They can be included in multiple queries to avoid duplication and promote code reusability. The other options do not accurately describe the purpose of the fragment keyword in GraphQL.