Knowledge of an author's culture a reader better understand
a. the personalities and emotions of a story's characters
b. the major plot events and conflicts of a story
c. the quality of a story's style, usage, and grammar
d. the values and beliefs of a story's characters

D. the values and beliefs of a story's characters

do you have more to the question?

both the address and the poster use diction to convey their message. diction is defined as a style of writing or speaking based on the types of words chosen in order to send a message. parallelism is when a similar sentence structure is used for several sentences on a text; roosevelt's address doesn't follow that. repetition has to do with repeating a word or sentence in order to emphasize and idea, however neither the poster nor the address use repetion. finally, the address doesn't use images to convey a message.