“Nest the existing input element inside a form element and assign "https://freecatphotoapp.com/submit-cat-photo" to the action attribute of the form element.”
I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.
You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.