Final answer:
Integrative pressures and conflict pressures are the key forces that have facilitated the developmental milestones of the late adolescent.
Step-by-step explanation:
The key forces that have facilitated the developmental milestones of the late adolescent are integrative pressures and conflict pressures.
Integrative Pressures:
Integrative pressures are the forces that bring people together and create a sense of unity within a society. These forces can include shared values, beliefs, and customs, as well as economic interdependence and cooperation. Late adolescents often find themselves connecting with others who share similar interests and goals, which can promote their development through social interactions and the formation of lasting relationships.
Conflict Pressures:
Conflict pressures refer to the tensions and challenges that individuals face as they navigate the transition from adolescence to adulthood. These pressures can arise from societal expectations, such as the pressure to pursue higher education or establish a career. Conflict pressures can also stem from internal struggles, such as identity exploration and the need to make important life decisions. Late adolescents are often confronted with these conflicting forces, which can be both stressful and transformative as they shape their identities and establish their place in the world.