Gerry used HTML for his website. Which best describes HTML?

HTML stands for HyperText Markup Language.

Explanation:

HTML specificifications define a set of tags which are used to display content on the web. Some examples of tags include:

... : to render the enclosed content in bold

... : to render the enclosed content in italics

... : to render the enclosed content underlined

Content encoded using HTML tags is interpreted by web browsers such as internet explorer, chrome or firefox and is rendered accordingly for the end users.

In simple words, HTML is the language of the internet.

HTML stands for hypertext markup language. This explains it quite good. It is a language in which you "describe" your content; you use markup code (HTML tags) to give meaning to the content. In combination with hyperlinks, the text becomes hypertext, creating a "web" of text.