Final answer:
The statement that rhetorical devices aid in supporting a writer's or speaker's appeals and purposes is true. Metaphors and similes are common tools for comparison, enhancing meaning and emphasis in the text.
Step-by-step explanation:
The statement that rhetorical devices are tools that help a writer or speaker support their appeals and achieve their purpose is true. Rhetorical devices serve a special function in the text—authors use them to convey meanings, create emphasis, and draw attention to their words and ideas. Two of the most common rhetorical devices are metaphors and similes, both of which are means of comparison. A metaphor directly compares two things by stating they are the same without using 'like' or 'as', while a simile makes a comparison using 'like' or 'as'. For example, 'The treasure chest of nature's wonders shone like a pirate's gold tooth' is a simile, and 'The pizza was a disk of saucy sunlight' is a metaphor.