Congenital adrenal hyperplasia (cah) is associated with expressing more masculine characteristics and behaviors among affected females. this is an example of what type of influence on behavior?

This is a biological influence on sexuality. This is where biology, genetics, and culture intermingle. While the biology has the ultimate say on "why" this is occurring, there is also the social and cultural bases of how we describe the characteristics as being more "masculine" than in other females without CAH.