What effect the repetition of the lines “brennan on the moor, brennan on the moor,/ bold and undaunted stood young brennan on the moor” has on the meaning of the poem

5. the following question refers to the four selections by albert einstein: these readings show that, between 1939 and 1952, einstein a) abandoned science and turned to political activism. b) revised his opinions about the need for nuclear weapons. c) worked tirelessly to abolish nuclear weapons. d) devoted himself solely to scientific research.