Which statement best explains why visual aids and other media contribute to an effective speech

Metonymy is best defined as a figure of speech in which

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were a wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.

According to the study, what made jonathan swift distrust the assumption most english people of his era made about the superiority of their own race and culture?