Personality refers to the unique and relatively stable pattern of thoughts, emotions, attitudes, and behaviours that distinguish one individual from another. It develops through the continuous interaction of biological, psychological, social, and environmental influences. Personality is not determined by a single factor but is the result of multiple interrelated factors that shape an individual's character, values, habits, and responses throughout life. One of the most important factors contributing to personality development is heredity. Heredity provides the biological foundation of personality through genes inherited from parents. Physical characteristics such as height, body structure, complexion, and facial features are largely inherited. Genetic factors also influence intelligence, temperament, emotional sensitivity, and certain behavioural tendencies. For example, some individuals are naturally calm, while others may be more energetic or emotionally reactive. However, heredity only provides the potential, and the environment determines how these traits are expressed. The family is another crucial factor in personality development. It is the first and most influential social institution in a person's life. Parents shape personality through their parenting style, emotional support, discipline, communication, and value system. A loving, secure, and supportive family environment promotes self-confidence, responsibility, and emotional stability. On the other hand, neglect, conflict, excessive control, or lack of affection may lead to insecurity, anxiety, or aggressive behaviour. Siblings and extended family members also influence social skills, cooperation, and emotional adjustment. The social environment plays a significant role in shaping personality.