Answer:
The fundamental building block in every Hypertext Markup Language (HTML) document is the element tag.
Step-by-step explanation:
Element describes the structure of any HTML document or a web page. An element will contain “Start and End tags”. There are few elements which contains start tag but does not contain an end tag.
There are elements to represent heading, paragraph, a body tag to define a body, anchor tag to link one link page to another. These tag contains both start and end tag. There are few tags where there is a start tag and no end tag.
Eg. Break tag which includes an empty line in the web page.