Mart Twain renders Huck Finn as a realistic, believable character by casting him as being realistic. Huck is portrayed as being a flawed and imperfect person who is sometimes naive and foolish. Huck, also, speaks in regionalisms, which makes him seem like a real person from his particular area.
Huck Finn is a believable, realistic character because Twain gives Huck a backstory, a unique voice rich in Southern dialect, and a mischievous personality. He "seems" real because he has a distinctive voice that is like one you might hear in real life (if you lived in the South).
I would say "Chips and cookies are high in fats and sugars which increases the risk of obesity.", because it is a direct cause of the problem, student obesity. :)
