How do you add a comment in HTML?

Adding a comment in HTML is done by wrapping the comment text in specific markup: <!-- comment here -->. This syntax tells the browser to ignore everything between the opening <!-- and closing --> tags, allowing developers to leave notes or explanations in the code that do not affect how the HTML is rendered on the page.

This method of commenting is standardized and recognized by all modern web browsers, making it a reliable way to include non-displayed annotations in your HTML documents. Comments can be very useful for keeping track of important information about sections of code or providing reminders for future changes.

The other options do not reflect the correct syntax or functionality of HTML comments. For example, using <comment> or <note> treats those tags as normal HTML elements, which would be displayed on the page, while <# comment here #> is a syntax used in some other programming languages but is not valid in HTML. Thus, the correct option clearly indicates the accepted way of adding comments in HTML.