<!DOCTYPE html>
<html>
<head>
<style>
img {
width: 100%;
}
</style>
</head>
<body>
<a href="/introduction-of-css">
<img src="https://developerstutorial.com/example-image/html.png" alt="CSS tutorial" style="width:42px;height:42px;">
</a>
</body>
</html>