Only do what the instructions ask you to do. I would restart the step to get the original HTML back. The only thing the instructions are asking you to do is:
"Add a comment above the p element with this text:
TODO: Add link to cat photos"
That’s it. That’s all you want to do. You should not modify any of the HTML that is already there. You are only adding new HTML to the code. If you make any other changes than adding the comment above the p element then you are doing it wrong.