What are the basic building blocks called in HTML?

The basic building blocks of HTML are known as elements. An element in HTML consists of a start tag, content, and an end tag, which together create a specific structure on a webpage. For instance, a paragraph element is defined with a start tag <p>, text content, and an end tag </p>. This structure makes it easy to define the different components of a webpage, such as headings, paragraphs, links, lists, and many others, each serving a specific purpose in the document's layout and presentation.

While tags are part of the structure of elements, they are not the building blocks themselves; rather, they define the start and end of an element. Components and sections are not standard terminologies associated with HTML in describing the fundamental building blocks, which further clarifies why elements is the accurate term in this context.