Html elements strong, iframe, and object

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), object element Defines an object embedded in the document. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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strong strong and iframe, strong, iframe, and object

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