What are italic and bold and bold italic and underline examples of?

Italic, bold, bold italic, and underline are styles of text formatting used to emphasize or differentiate text in written communication. Italic is typically used for emphasis or to denote titles, while bold makes text stand out more prominently. Bold italic combines both styles for stronger emphasis, and underline is often used to highlight important information or links. These formatting options enhance readability and convey meaning in various contexts, such as print and digital media.