The correct answer is (c) Mozilla Firefox.
A web browser is a software application that allows users to access and view websites. It does this by sending requests to web servers and receiving the HTML, CSS, and JavaScript that make up the website. The browser then interprets these codes and displays the website to the user.
Linux is an operating system, while Facebook is a social networking website. Neither of these are web browsers.
Mozilla Firefox is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. It is the second most popular web browser in the world, after Google Chrome.
Other popular web browsers include Google Chrome, Microsoft Edge, Apple Safari, and Opera.