I would say that responsibility is an unwritten aspect of freedom because whether or not you want this to occur, freedom brings with it responsibility. Part of having freedom means being able to make your own decisions, which requires that one have responsibility in order to make smart choices.
The main difference between them is that an expository essay explains about something while a persuasive essay argues about something.
Motif<span> and </span>theme<span> are linked in a literary work but there is a difference between them. In a literary piece, a </span>motif<span> is a recurrent image, idea or a symbol that develops or explains a </span>theme<span> while a </span>theme<span> is a central idea or message.</span>