It asks the browser to select all h1, h2 and p elements and apply a specific styling to them (in this case the text-align: center style).
So now you’re asked to add a body selector.
This should be very similar to the above code but instead of selecting those h1/h2/p, you are telling the browser you want body.
So just do exactly what you did before for the other tags selectors…
As for the style of background-color, well that is also treated the same way as the above ‘text-align: center;’ line. You just need to add a line that is formatted the same way inside the curly braces for the body selector.
so to conclude: to use a body selector, just do the same thing that you did to use a h1/h2/p selector.