) in XHTML Elements can be in uppercase

in XHTML Attribute names must always be in lowercase

in XHTML Attribute values sometimes maybe not quoted

<img src =”any”>  this represents a valid XHTML

<img src =”any” />  this represents a valid XHTML

<p> Any text  this represents a valid XHTML

<p> Any text </p>  this represents a valid XHTML

CSS is used to control the style of a web document in a simple and easy way

CSS is the acronym for

CSS handles the look and feel part of a web page

it provides powerful control over the presentation of HTML document

CSS advantages

is a type of attribute of HTML tag

are assigned to properties

is an HTML tag at which a style will be applied. This could be any tag

selector { value: property } This syntax is true

CSS selectors are used to "find" (or select) the HTML elements you want to style

the universal selector quite simply matches the name of any element type

uses the id attribute of an HTML element to select a specific element