Ben and Sarah are siblings. Their parents play with and regularly encourage them to play "intellectual" games such as chess and concentration. Ben hates these activities, while Sarah loves them. This different reaction to playing intellectual games is perfectly understandable from the perspective of passive genotype/environment correlations if

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Passive genotype/environment correlations occur when parents provide both genes and environment that are correlated with each other. In this scenario, the parents are providing the intellectual games as well as the genes for intellectual ability. If Ben is an adopted child, he may not have inherited the genes for strong intellectual abilities, which would explain his dislike of these games. On the other hand, Sarah may have inherited these genes, which would explain her enjoyment of the games. The other choices do not necessarily explain these differences in preferences for intellectual games.

Ben and Sarah Are Siblings