What type of rhetorical device does kennedy use in this sentence "transit satellites are our ships at sea to steer a safer course a humor b. alliteration c. repetition d. assonance

In the sentence expressed by Kennedy, there are many words that contain the letter "s" in the stressed syllable. For example: satellites, ships, sea, safer, steer. Whenever a sentence contains the repetition of a letter in the stressed syllable of words that are close to each other, alliteration occurs. This rhetorical device is used by Kennedy in this sentence, and it helps to put emphasis on some words and to create a mood.