Stuck on 1.Introduction, pop-up saying I need two images

Language Help HTML
1

So, I’ve put in a link, and a normal picture:

1004×539 50.1 KB

But then this pop up happens:

1012×526 60.3 KB

I’ve reset the codes, and put them in two times. Help please.

2

Just add another element after the link.

    </a>
    <img ... >    # here