Answer :
Answer: Major Depressive Disorder
Explanation: Major depressive disorder also known as clinical depression, refers to a mental health disorder, which occurs with a continuous depressed mood or loss of interest in activities, which integrates into emotional and physical problems and other life activities impairment.
This disorder is believed to be caused by an aggregate of environmental, genetic, and psychological factors.
However, family history of the disorder, extreme life changes, specialised medications, chronic health problems, and substance (drug) abuse, are important risk factors.