Answer & Explanation:
The revision that changes the sentence to draw attention to the object of the action rather than the people or things performing the action is:
"The 'space race' was a Cold War competition by scientists."
This sentence emphasizes the object of the action ("space race") by placing it at the beginning of the sentence and using the passive voice to downplay the importance of the subject ("scientists"). The focus is on the competition itself and the historical context in which it occurred, rather than the individuals who were involved in it.