How do you access your external css script?

Let following be HTML page:

<HTML>

<head>

<link href='external_style.css' type='text/css' rel='stylesheet'>

</head>

<body>

<p>Hello world</p>

</body>

</HTML>

and following be external css script:

p {text-decoration:underline}

Here is HTML document, in the head section tag <link> is used. Tag link is used to get reference of external style sheet page named "external_style.css" using href property. Both css page and HTML page resides in same directory.

the external css page cannot contain any tags like:<HTML> or <style>

it can contain only style specification like:

p {font-size : 8pt}

H1 {text-decoration:underline}

etc