The correct answer is Psychological.

The psychological approach attributes abnormal behavior to inadequacies in an individual's thoughts, feelings, and perceptions. This approach emphasizes the role of psychological factors, such as early childhood experiences, personality traits, and coping mechanisms, in contributing to the development of mental disorders.

The other options are not correct:

• The organic approach focuses on biological factors, such as brain abnormalities or genetic predisposition, as the primary causes of abnormal behavior.

• The organismic approach views abnormal behavior as an adaptive response to internal or external stressors.

• The socio-cultural approach emphasizes the influence of social and cultural factors, such as poverty, discrimination, and cultural norms, on the development of mental disorders.