[Pattern] E [Meaning] Matches any E element. [Described in section] 
Type selectors
U n i v e r s a l s e l e c t o r
T y p e s e l e c t o r s
D e s c e n d a n t s e l e c t o r s
C h i l d s e l e c t o r s
T h e : f i r s t - c h i l d p s e u d o - c l a s s
A d j a c e n t s e l e c t o r s
A t t r i b u t e s e l e c t o r s
T h e " c l a s s " a t t r i b u t e i n H T M L
I D s e l e c t o r s