To achieve the described behavior of loading low-res images first and replacing them with high-res images when loaded, you can use React's Suspense and React.lazy() along with the fallback attribute. This allows you to asynchronously load components, such as images, and show a loading fallback while waiting for the high-res image to load. The other options may be used in different contexts but do not directly address this use case.

In React, when a parent component renders, it will cause all its child components to potentially re-render as well. This is because React re-renders the child components to ensure that they reflect any changes in the parent's state or props.

In React Native, developers often use a bridge called "JavaScript Bridge" to run native modules. This bridge allows communication between JavaScript code and native code, enabling the use of native modules in React Native applications. The other options are not commonly used terms for this concept.

React Testing Library is specifically designed for testing React components. It offers a set of utilities for interacting with and asserting the behavior of React components in a way that mimics how users interact with a UI. It promotes best practices for testing React applications and makes it easier to write effective tests for your components.

Higher-Order Components (HOCs) can be combined with Context to provide data directly to components that need it, reducing the need for prop drilling (passing data through multiple intermediate components). Context provides a way to share data across the component tree without explicitly passing props at each level.

The useDispatch hook is used to dispatch actions to the Redux store in a React-Redux application. It provides a reference to the dispatch function, allowing you to trigger actions from your components. The other options are not used for dispatching actions.

To ensure accessibility for screen reader users, it's crucial to implement ARIA (Accessible Rich Internet Applications) roles and attributes correctly. ARIA provides semantic information to assistive technologies like screen readers, making the modal content understandable and navigable. Hiding the modal with CSS or disabling screen reader functionality is not recommended as it can hinder accessibility. Relying on default behavior may not guarantee accessibility.

Data is sent between the main thread and a Web Worker through a process called "Message Passing." In Web Workers, messages can be passed between the main thread and the worker thread to exchange data and instructions. This communication method is essential for the interaction between the two threads. The other options are not the standard terms used for this process.

To manage the local UI state in a quiz application where users can select answers, you would use the useState hook. useState allows you to create state variables that can hold the selected option and trigger UI updates when the user makes a choice. While useRef, useReducer, and useContext have their use cases, they are not the primary choice for managing local UI state in this scenario.

React Native's mechanism to "hot reload" and see changes instantly without a full app reload is called "Instant Refresh." It is a valuable feature in React Native development that accelerates the development process by allowing developers to view changes immediately. The other options do not accurately describe this specific React Native feature.

To manage form input values in a functional component, the most appropriate hook is useState. useState allows you to create and update state variables, which can be used to track form input values as users interact with the form elements. While useEffect, useMemo, and useContext have their use cases, they are not designed for managing form state directly.

In React, event handlers set on components are actually set on the component instances themselves and not on the individual DOM elements. This allows React to efficiently manage and delegate events within its virtual DOM, making it a key aspect of React's event handling mechanism.