"Advertising goes down the street with us; it's on trains, planes, and buses.”
C. Narrative has a plot, character and setting.
Think of a movie with Morgan Freeman, in the beginning when he Narrates he is describing the setting, plot, and sometimes characters.
...a type of commitment in which the parents of a boy and agirl agreeon having them marry.
According to the information available on this excerpt, a betrothal is a promise which can be later modified, in which the parents of a boy and a girl promise to marry them. This could also be a definition of arranged marriage.
