Which of the following describes a browser?

A browser is fundamentally a software application designed specifically for accessing and navigating the internet. It enables users to view and interact with web pages by interpreting HTML, CSS, and JavaScript. This program retrieves content from web servers and displays it in a user-friendly format, allowing users to conduct searches, view images, watch videos, and engage with various online applications.

In contrast, the other options refer to different concepts related to internet functionality. The assignment of IP addresses pertains to networking and is managed by a device known as a router or server, not a browser. Protocols for online communication, such as HTTP or FTP, facilitate data transfer and communication over the internet, but these are not browsers themselves. Lastly, an internet service provider (ISP) is a company that provides users with access to the internet, which is a different entity altogether from a web browser. Thus, A accurately encapsulates the definition and function of a browser.