Making the world better, one answer at a time. The word foil in drama means a character or scene that is set up as a contrast to another so that each will stand out vividly.. Hope that helped.
Typically, a comforter is a thick, quilted, fluffy blanket that is used to keep you warm. It is usually filled with synthetic fiber filler which is quilted or stitched to secure the filling and keep it evenly distributed. Unlike a duvet, the comforter only forms one piece of all of your bed linens.
Well, according to wikipedia, both go on top of your bed, but a duvet actually 'covers a comforter like a big pillowcase.' many comforters are filled with a synthetic fiber. They are generally printed or dyed and do not need a cover it is easy to understand why there is confusion between a 'duvet' and a 'comforter'.