revision:
The rows attribute specifies the visible height of a text area, in lines. The size of a textarea can also be specified by the CSS "height" and "width" properties.
The rows attribute can be used on the following element: <textarea>.
<textarea rows="number"></textarea>
number: specifies the height of the text area (in lines). Default value is 2.
<textarea style="margin-left:3vw;" rows="6" cols="50">By using the examples, tutorials,
and projects on my website, you will learn how to make a website. The only thing we ask
you for is to devote enpugh effort and time to his undertaking.</textarea>
<form style="margin-left:3vw;" name="user_info" action="action.php" method="post">
Name : <input type="text" name="name"><br>
email : <input type="text" name="email"><br>
Describe yourself : <br>
<textarea rows="10" cols="20" name="describe_yourself">
</textarea>
<input type="submit" name="submit" value="Submit">
</form>