1.	To style all the Html elements of a specific type: 
use the tag type (ex: div, p, a) as the specifier.
2.	Style all the Html elements of a specified class: 
use the class name, with a dot (.) prefix.
3.	Style a single Html tag: 
use the tags id with a hashtag prefix (#) as the specifier.
Example:	div{
		     color:red;    
			}
			.someclass{
				 color:blue;
			}
			.someid{
				 color:yellow;
			}