Your image should have an arc attribute that points to the Kitten image

<h2>catphotoapp</h2>
<Main>
<Img   src="https://we.freecatphotoapp.com/your image.jpg"  alt="a business cat wearing a tie.">

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.

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).