An internal conflict features character vs

a. character
b. nature
c. self
d. society

The answer is C: self. A conflict involves a struggle. In the case of an internal conflict one character is  experiencing a struggle between two desires or emotions, it's a psychological conflict, a fight inside between good and evil, virtue and vice. All this causes a lack of action and a mental agony. A external conflict involves another character, society and nature.

bildungsroman is a german word for novel covering youth to adulthood which describes a coming-of-age story