Why is language an important tool in developing a monster character in a story?

a. the reader can compare the story to other stories she has read in his or her language.
b. the author can steer the plot of the story in directions that the reader never expects.
c. the reader can grasp subtle aspects of a monster's character because of carefully chosen words.
d. the author can describe the monster in a such way that the reader does not have to use his or her imagination.