Answer:
the amygdala—the seat of emotions such as anger—matures earlier than the prefrontal cortex in adolescents.
Explanation:
Amygdala is set of neurons in the brain that controls the set of emotions in a person.
At the adolescent stage, a person's both physical as well as psychological development takes places and a number of changes occur in the body both physically and emotionally.
So Donna's daughter at her adolescent stage is going through the same changes. Donna's daughter gets angry easily and at very small things. She instantly flares up at the slightest provocations.
As a specialist, I would inform Donna about her child's behavior by explaining the biological reason ---
the amygdala—the seat of emotions such as anger—matures earlier than the prefrontal cortex in adolescents.