label element Defines a label on a form, strong element Specifies that the enclosed text should be rendered in the browser as "strong" (usually bold) text, iframe element Defines an inline frame (ie a frame embedded in a document). These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.
Click the html element name in the punctuation list to advance the example in 'Tryit-Editor':