- Nothing; it should always remain blank
- The location or URL of an image file
- The CSS coordinates where an image should appear
- The class name, used in CSS to style the image
EXPLANATION
The <src> attribute requires the location or URL of an image file. And as a best practice, include an <alt> attribute, which acts as a searchable description of the image file. For example, <img src=”jim-webb.jpg” alt=”Jim Webb (headshot)”>