Final answer:
At 18 or 19, the brain is still developing, especially the prefrontal cortex, which is responsible for executive functions like judgment and impulse control; it fully matures around 25 years of age.
Step-by-step explanation:
If you are 18 or 19 years old, you can say that b. Your brain is still developing, particularly the prefrontal cortex. The brain does not finish maturing until about 25 years old, and the development of the prefrontal cortex is important during this stage. This part of the brain is responsible for executive functions such as judgment, impulse control, and planning and continues to mature into early adulthood.
During adolescence, the frontal lobes, which are associated with planning, reasoning, memory, and impulse control, grow rapidly. However, the full maturation of the frontal lobes occurs by 25 years old. Adolescents engage in increased risk-taking behaviors and emotional outbursts which may be attributed to the ongoing development of the frontal lobes. Cognitive development, including the capacity for insight and judgment, continues into the early 20s and is influenced by experiences during this period of growth.