Final answer:
President Kennedy used figurative language, specifically a metaphor, to compare space exploration to embarking on a sea voyage in his 'We Choose to Go to the Moon' speech.
Step-by-step explanation:
In President John F. Kennedy's "We Choose to Go to the Moon" speech, he utilizes figurative language when he says, "We set sail on this new sea because there is new knowledge to be gained, and new rights to be won." This metaphor compares space exploration to a journey at sea, emphasizing the adventurous and pioneering spirit of the endeavor. Kennedy's speech reflects his administration's commitment to space exploration as part of his broader vision for progress, including winning the space race against the Soviet Union.