Final answer:
Studies of identical twins who had been reared apart most clearly highlight the importance of environmental influences.
Step-by-step explanation:
The studies of identical twins who had been reared apart most clearly highlight the importance of environmental influences. These studies compare twins who share the same genetics but were socialized in different ways, allowing researchers to understand how our temperaments, preferences, and abilities are shaped by our genetic makeup versus our social environment. For example, the Minnesota Study of Twins Reared Apart found that identical twins, whether raised together or apart, have very similar personalities, suggesting the heritability of some personality traits.