The action attribute indicates where form data should be sent. For example, <form action="/submit-url"></form> tells the browser that the form data should be sent to the path /submit-url.
Add an action attribute with the value https://freecatphotoapp.com/submit-cat-photo to the form element.
If you have a question about a specific challenge as it relates to your written code for that challenge, just click the Ask for Help button located on the challenge. It will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.