What type of rhetorical advice does kennedy use in this sentence?

B). Assonance.

Explanation:

John F. Kennedy took oath as the 35th president of the United States and was quite influential personality. In this excerpt from his famous address at 'Rice University' on the Nation's Space Effort' uses 'assonance' to make his speech more meaningful and effective. Assonance is the literary device that involves the repetition of identical vowel sounds in order to set the mood and reinforce an idea. Kennedy in the given excerpt, uses assonance as displayed by words 'meet', 'noted', 'knowledge', 'progress', 'strength', 'change', 'challenge', 'hope', 'fear', 'ignorance', etc. As we witness the constant repetition of vowel 'e' that demonstrates assonance. Thus,  the correct answer is option B.

the future of her and bobby i think is her name got this book 1 year ago forgot her name but yeah

hope i you : )

they fear for their lives