Answer:
Biological
Step-by-step explanation:
Depression
This are disorders that usually affects mood, physical and mental health of an individual.. it is of a prevalence and lifetime. It is characterized by symptoms: females-sadness, males-irritability, anger.
Clinical depression
This is a mental disorder characterized by prolonged weeks of low mood that is persistent across most situations.
There is an evidence of biological factors in Depression. They are simply disorders that have genetic basis and can be treated with drugs that may correct the imbalance. The are usually are accompanied by changes in biological function (sleeping, eating) and there may be brain abnormalities underlie the disorder and anxiety.