To terminate a Web Worker from the main thread, you call the terminate() method. This method stops the execution of the worker thread. The other options are not the correct methods for terminating a Web Worker from the main thread.

The main advantage of using Render Props over Higher Order Components (HOCs) in React is improved component reusability and composability. Render Props make it easier to share logic between components and are more flexible than HOCs, which can lead to more maintainable and readable code. While HOCs have their own benefits, they may not offer the same level of flexibility as Render Props.

In React-Redux, the hook used to extract data from the Redux store is useSelector. This hook allows you to select data from the store's state and use it in your components. mapDispatchToProps is used for dispatching actions, connect is a higher-order component for connecting React components to the store, and useEffect is used for side effects.

In the context of React and Redux, 'immutable state' refers to state that cannot be changed after it's created. In Redux, state immutability is a core principle. Instead of modifying the existing state, a new state object is created with the desired changes. This immutability ensures predictability and helps in tracking state changes, making debugging and testing easier.

React Portals, despite their ability to exist anywhere in the DOM tree, behave like normal React children when it comes to event handling, including event bubbling. This means that events triggered inside a portal can bubble up to their ancestors in the React component hierarchy.

To implement event delegation in a React application, you should create separate event listeners for each element. This approach involves attaching a single event listener to a common ancestor and utilizing event propagation to handle events for multiple elements efficiently. It's a common technique to reduce the number of event handlers and optimize performance in large-scale React applications.

In the context of HOCs, "inverse inheritance" refers to the mechanism of passing data from child components to parent components. This is achieved through props passed from the child to the HOC, which can then propagate the data upwards in the component tree. It's a technique to invert the flow of data, which can be useful in certain scenarios. It's not about code reusability, exposing props to the DOM, or component wrapping.

"CSS-in-JS" in React refers to a technique where you write CSS code within JavaScript using template literals. This approach allows for dynamic styling and scoped styles, enhancing component-based styling in React applications. The other options describe different CSS-related approaches but not specifically "CSS-in-JS."

You should use a function inside setState or useState when dealing with complex states or when the new state depends on the previous state. This ensures that the state updates are based on the latest state and prevents issues related to asynchronous state updates. Using functions is especially important in functional components, as it helps maintain state consistency.

To optimize a large React application and load components only when needed, you would typically use code-splitting with dynamic imports. This technique allows you to split your bundle into smaller chunks and load them on-demand. useMemo() is used for memoization, Redux is for state management, and server-side rendering is a different optimization technique not directly related to lazy loading components.