Answer» - According to this model, abnormal behaviour results from biological, psychological, and socio-cultural factors. 
 - Biological factors include age, genetics, physical health. 
 - Psychological factors include mental and emotional health, beliefs, and expectations. 
 - Sociocultural factors include interpersonal relations and socioeconomic factors. 
 - If a person who has a biological predisposition towards abnormality, gets to live in a protective and nurturing environment, there are fewer chances of developing abnormal behaviour. 
 - Conversely, if he is placed in an environment detrimental to his mental and social well-being, he will show abnormal behaviour.
  
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