How to write comment for other developers

Tell us what’s happening:

Your code so far

<!--<h1> Hello world</h1>

<h2> clip photo</h2>

<p> delete unnecessary things.</p> -->

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Safari/605.1.15.

Challenge: Uncomment HTML

Link to the challenge:

comments in html are written as <!--- -->. So in this challenge you are supposed to remove the comments.