Answer:
the "font-family" property is used to specify the font to be used for the text. In this case, "Arial" is specified as the preferred font, and if it is not available, the browser will use a generic sans-serif font.
Step-by-step explanation:
To change the font of a text, you can use the CSS "font-family" property in HTML or use a document editor that allows you to change the font style. Here's an example of changing the font in HTML:
```html
<!DOCTYPE html>
<html>
<head>
<style>
body {
font-family: Arial, sans-serif;
}
</style>
</head>
<body>
<h1>This is a heading</h1>
<p>This is a paragraph.</p>
</body>
</html>
```
In this example, the "font-family" property is used to specify the font to be used for the text. In this case, "Arial" is specified as the preferred font, and if it is not available, the browser will use a generic sans-serif font.