fix the error that is below
Consider adding a lang attribute to the html start tag to declare the language of this document.
<!DOCTYPE html>
<html>
<head>
<title>Troublesome HTML</title>
</head>
<body>
<div class="img-div">
<img src="example.gif" width="66" height="111" alt="Example image">
</div>
<h1>HTML? Or HTM Oh-Well?!</h1>
<p>Here's some HTML that isn't quite up to snuff.</p>
<ol>
<li>Can you spot the bad markup? <strong>It can be tough to spot!</strong></li>
<li>But it's there...</li>
<li>Hiding.</li>
<li>Waiting to mess something up.</li>
</ol>
</body>
</html>
To fix this error, you need to add a lang attribute to the html start tag. The lang attribute declares the language of the document. Choose the appropriate language code and add it to the opening html tag. For example, to declare English (United States) as the language, you can add lang="en-US" to the html start tag, like this:
<!DOCTYPE html>
<html lang="en-US">
<head>
<title>Troublesome HTML</title>
</head>
...
</html>