Final answer:
President Kennedy uses parallelism as a rhetorical device to organize and emphasize the idea of collective action towards liberty. Additionally, Kennedy's speech includes repetition and can be analyzed for other rhetorical strategies like anaphora and epistrophe.
Step-by-step explanation:
Kennedy utilizes the rhetorical device of parallelism to effectively convey his message about the United States' collective effort towards 'the success of liberty.' Parallelism and repetition are strategically employed to organize ideas and emphasize key points within a speech or text. Furthermore, Kennedy's use of parallelism can be interconnected with rhetorical strategies such as anaphora and epistrophe, which involve repeating phrases at the beginning and end of sentences, respectively.
When analyzing rhetoric, it is critical to recognize not only parallelism but also the impact of other devices such as repetition, personification, and the use of numerical data to bolster arguments. Noteworthy examples include the repetition of a single word or phrase to highlight a concept, as well as the employment of metaphors and similes to draw comparisons and paint a vivid picture for the audience. These devices are crucial for enhancing the persuasive effect of any speech or written work.