Final answer:
HTML is the special formatting language used to create the structure of Web pages, distinguishing it from other options like CSS, JavaScript, and Python.
Step-by-step explanation:
The special formatting language used to create Web pages is HTML (HyperText Markup Language). HTML provides the structure of a webpage, which can then be styled with CSS (Cascading Style Sheets) and made interactive with JavaScript. Python is a programming language that can be used for a variety of applications, including web development, but is not used for the basic structuring of web pages. Therefore, the correct answer to the question is A) HTML.