We can’t quite see your actual HTML. To display your code in here you need to wrap it in triple back ticks. On a line by itself type three back ticks. Then on the first line below the three back ticks paste in your code. Then below your code on a new line type three more back ticks. The back tick on my keyboard is in the upper left just above the Tab key and below the Esc key.
Nesting an element means placing it between the opening and closing tags of another element. Is your h1 nested inside the div? Also, opening tags don’t have a forward slash.
The h1 was NOT nested inside the div. l thought it wanted me to do a CSS originally because it asked for a .header element. From my understanding that means CSS code.
My new code…