Answer:
first borns are overrepresented in positions associated with very high levels of achievements
Explanation:
they ask for certain personality traits and that's the only answer that gives it.
The sentence from passage one that supports the idea that birth order is associated with certain personality traits is first-borns are overrepresented in positions associated with very high levels of achievement.
According to the passage, it was stated that researchers believe that birth order was vital to the character traits of an individual. Birth order means where an individual falls in the order of birth.
Therefore, the sentence from passage one that supports the idea that birth order is associated with certain personality traits is first-borns are overrepresented in positions associated with very high level of achievement.
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