Can't get img to responsibly size

Here is the code pen. I have tried doing width:100%; and height: auto; but nothing has worked on passing the test. I would appreciate some help!

Thank you!

I am not sure about the tests that you have to pass. However, the issue looks to be that the width of the page content is set to a constant 1024px so the image element, as long as the rest of the page, keeps it’s width regardless of how you change the viewport.