Day 21

 u> The element is used <u>to display text with a horizontal line below the baseline of its content.

In HTML5, this element represents a piece of text that is indicated by applying a clear effect to it but that effect is not textual and is not specified, or to indicate that the text is misspelled.

<var> The representation of a variable in a mathematical expression or in a program code.

<wbr> The element defines <wbr>a point for line break when needed. The name of this element stands for Word Break Opportunity, meaning that the browser is allowed to break the line at this location even though the line break rules do not allow a new line to be created at that location.