Answer:
The part of the plot structure that this excerpt illustrates is:
C. exposition
Explanation:
In literature, exposition is the part of a story in which the author sets the stage for what will happen. It is where the theme, characters, conflicts, setting and/or circumstances are laid out. This is, for obvious reasons, usually placed at the very beginning of the story. The excerpt we are studying here has the opening "once upon a time," which is typical of the beginning of short stories, fables, and fairy tales. However, even if it didn't have such an opening, the excerpt is still introducing the characters and information about them, as well as the existing conflict caused by jealousy.
This part of the small intestine is called the duodenum.
The underlined verb in the sentence is a being verb.
C: To ask a question
If it ends in a period, it is most likely to make a statement, express a feeling, or to give an order. Examples:
Fish swim in water.
I'm very happy.
Go clean your room now.
If it ends in a question mark it is to ask a question. Examples:
Are you happy?
if it ends in an exclamation point it is to either give an order or express a feeling (usually of excitement or surprise). Examples:
Go clean now!
I'm very happy!
Ah! (surprise)