W3School-BS3Exercises/BS3-Images/bsImagesE2.html

<!--
	from BOOTSTRAP 3 Images: Exercise 2 ( https://www.w3schools.com/bootstrap/exercise_bs3.asp?filename=exercise_bs3_images2 )

	question:
	Use a Bootstrap class to add rounded corners on the image.

	<img src="img_chania.jpg" alt="Chania" class="___________">

//-->
<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>

<!-- BEGIN: answer -->
<img src="https://www.w3schools.com/bootstrap/img_chania.jpg" alt="Chania" class="img-rounded">
<!-- END: answer -->

</body>
</html>