(i) She should use comments in HTML.
Any text to make comments in HTML, should be preceded by <! and should end with ->
Example:
<body>
<!-
This is only used for comment
->
Welcome
</body>
(ii)
- HTML is used to display data and to focus on formatting of data, whereas XML is used to describe data and focus on what data is.
- HTML tags are not case sensitive whereas XML tags are case sensitive.
- HTML tags are predefined, whereas XML tags are not predefined.
- XML is used to store and transfer the data over different platforms while HTML is used to design webpages.