Final answer:
G. Stanley Hall emphasized the storm and stress theory of adolescence, which suggests that this period is characterized by emotional turbulence.
Step-by-step explanation:
Among the aspects of adolescence emphasized by G. Stanley Hall is Option 3: The storm and stress theory highlighting emotional turbulence. Hall's view of adolescence focused on the storm and stress that this developmental stage entails, arguing it is a period marked by emotional upheaval, conflict with parents, and risky behavior. This contrasts with early views that adolescence was a mere reflection of earlier childhood experiences or primarily driven by genetics.
The storm and stress view is one that attributes the challenges faced during adolescence to the biological and physiological changes that are occurring. Although modern research sometimes disputes the universality and intensity of the storm and stress period, acknowledging only a minority of teens experience major conflicts with their parents, Hall's theory remains a foundational element in the study of adolescent psychology.