John Kennedy used the comparing similarities and differences stylistic feature in his speech.
Step-by-step explanation:
John F. Kennedy was one of the former Presidents of the United States of America. In his famous speeches like the “Moon” speech and the inaugural speech to name some we often find the use of antithesis or the comparing similarities and differences as the commonly used stylistic feature.
An antithesis is a rhetorical device that contrasts two opposing thoughts or ideas and sometimes compares similar notions as well. The use of expressions like “well or ill”, “support any friend and oppose any foe” denote the presence of antithesis as they are differences that are being compared, and therefore this stylistic feature is used in his speech.