Final answer:
HTML is a programming language used to create websites and blogs, which is integral to understanding and interacting with various forms of media online.
Step-by-step explanation:
HTML stands for Hypertext Markup Language and is option B: A programming language used to create websites and blogs. It is not merely a pathway to other sites or just an aspect of design ideas; nor is it a website itself. HTML is the foundational language that allows developers to structure content on the web. This includes text, images, and links, which can be enhanced further with CSS (Cascading Style Sheets) for layout and style, and JavaScript for interactivity.
In the context of media literacy, understanding HTML is part of being literate in the computers and technology domain. Whether dealing with meme culture, engaging in academic discourse, or making political statements through blogs, HTML provides the infrastructure for those messages to exist online and for people to interact with them.