Answer:
Winston Churchill in his speech 'We shall fight on the beaches' primarily aims to persuade the British audience to not give in and stand up to the challenge. He also aimed ot gather support from the United States in the war. To accomplish his purpose and make his message more effective, he uses a variety of rhetorical devices like alliteration, enumeration, assonance, repetition, and rhetorical questions. The use of alliteration and assonance in 'The British Empire and the French Republic, linked together in their cause and in their need, will defend to the death their native soil,' helps in capturing the audience's attention. While the repetition of phrases like 'we shall..', 'if necessary for years, if necessary alone' helps him encourage the audience and makes his idea more memeroable and leaves a dramatic effect.