Final answer:
Researchers have connected temperament, emotional responsiveness, and brain structure to personality. Temperament has a biological basis, and genetic predispositions influence personality traits, brain development, and behavior.
Step-by-step explanation:
Researchers have tried to connect several biological variables to personality, including temperament, emotional responsiveness, and brain structure. Temperament is believed to have a biological basis and can be categorized into different types. Environmental factors and maturation can also influence the expression of personality traits in children. Genetic predispositions, on the other hand, play a role in shaping personality traits, brain development, and behavior. Genes are associated with temperament, psychological disorders, and various behavioral characteristics.