Final answer:
Adolescent brain development in the frontal lobe is slow, leading to maturing executive functions like impulse control and planning into early adulthood, which can manifest as increased risk-taking and emotional responses in teenagers.
Step-by-step explanation:
During adolescence, brain development proceeds relatively slowly in the frontal lobe, a region implicated in self-regulation. This part of the brain, which includes the prefrontal cortex, is essential for executive functions, such as decision making, impulse control, and planning. These functions are crucial for responsible behavior and judgment, which explains why adolescents may exhibit increased risk-taking behaviors and emotional outbursts as their frontal lobes are still developing into early adulthood.