What are the main elements of the Node.js runtime environment?

The main components of the Node.js runtime environment include:

• V8 JavaScript Engine — the engine that compiles and executes JavaScript code.
• libuv — a library that provides asynchronous I/O and event loop, allowing Node.js to work with files, networks, and other resources without blocking.
• Node.js API — a set of modules and functions that provide access to the file system, network, processes, and other operating system features.
• Event Loop — a mechanism that manages asynchronous operations and callbacks, ensuring non-blocking execution of code.

These components together enable Node.js to efficiently run JavaScript outside the browser, handling multiple I/O operations concurrently.