Ordered (numbered) lists can be created by using <ol> and <li> elements.
Ordered lists start with an opening <ol> element, followed by any number of <li> elements. Finally, ordered lists are closed with the </ol> tag.
Final Code
<h2>CatPhotoApp</h2><main><p>Click here to view more <ahref="#">cat photos</a>.</p><ahref="#"><imgsrc="https://www.bit.ly/fcc-relaxing-cat"alt="A cute orange..."></a><p>Things cats love:</p><ul><li>cat nip</li><li>laser pointers</li><li>lasagna</li></ul><p>Top 3 things cats hate:</p><ol><li>flea treatment</li><li>thunder</li><li>other cats</li></ol></main>