To solve this question, the user needs to have basic knowledge of HTML. The user should know that HTML is a markup language that has a defined set of rules for writing valid code.
The correct answer is:
A. Syntax
Option A is the correct answer because the set of rules that govern the structure and format of HTML code is called its syntax. The syntax of HTML follows a specific set of rules that define how elements can be combined to create valid web pages.
Option B is incorrect because tags are the building blocks of HTML elements and are used to define and format content.
Option C is incorrect because dialog is not related to HTML; it is a user interface component that displays content to the user.
Option D is incorrect because HTML does not have laws; it has rules that define the structure and format of valid HTML code.
Therefore, the correct answer is:
The Answer is: A. Syntax