Music staff with black note with stem on the third line, and TAB staff with a zero on the second line from the top. How are staff lines used in music notation and TAB lines different?

Staff lines represent strings, while TAB lines represent pitches.
Staff lines represent pitches, while TAB lines represent strings.
Staff lines indicate the number of beats a note gets, while TAB lines indicate the numbers of strums.
Staff lines are used for classical guitars, while TAB lines are used for electric guitars.