A pseudo-class is used to define a special state of an element,Pseudo-classes can be combined with CSS classes,When you hover over the link in the example, it will change color,The :first-child pseudo-class matches a specified element that is the first child of another element,The :lang pseudo-class allows you to define special rules for different languages,A CSS pseudo-element is used to style specified parts of an element,The :first-line pseudo-element is used to add a special style to the first line of a text.