How does the choice of a narrator affect the plot of a narrative?
the choice of a narrator affects whether or not the conflict is resolved.
the narrator's point of view affects whether or not the plot is interesting.
the choice of a narrator affects how long the exposition runs.
the narrator's point of view affects the amount of information the reader receives.

In this item, we are asked to determine as to how the choice of a narrator affect the plot of a narrative. The answer to this question is that, depending on the choice of a narrator, the point of view is also affected. Thus, the answer to this particular item is the last choice.

The way how the choice of a narrator affects the plot of a narrative is that the narrator's point of view affects the amount of information the reader receives. Some points of a narrative an author can consider more important than other ones, and the thing author emphasizes will form a main conflict of a story. The way how author perceives things is illustrated in the amount of information he\she represents.

Venom, snakes? if that’s what your asking?