Which tag is used to create a line break in HTML?

The tag used to create a line break in HTML is the <br> tag. This tag is an empty element, meaning it does not require a closing tag, and it is specifically designed to insert a line break in the content of a web page.

When the <br> tag is placed within text, the browser interprets it as a signal to start a new line. This is particularly useful in paragraph formatting or when needing to separate content without starting a new paragraph. For instance, using the <br> tag can create space between lines of text within the same paragraph, helping to improve readability and structure.

Other options like <break>, <line>, and <newline> are not valid HTML tags for creating line breaks. Therefore, they do not have any functionality associated with line breaks in web pages, which reinforces the correctness of using the <br> tag for this purpose.