Aquatrain is
a. a stanza consisting of four lines.
b. a dedication that precedes a ballad.
c. a pair of lines at the end of the poem.
d. a pattern of three unstressed syllables followed by a stressed syllable.

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.