Final answer:
The term 'nervous breakdown' has no formal psychological meaning (option c) and is not used as a clinical term in mental health; rather, it is an informal term describing a period of mental distress where a person cannot function in daily life.
Step-by-step explanation:
The term 'nervous breakdown' has no formal psychological meaning. It is an informal, non-clinical term that is often used by the general public to describe a period of intense mental distress during which a person is unable to function in their daily life. This term does not reflect a specific mental illness or disorder as classified by the Diagnostic and Statistical Manual of Mental Disorders (DSM), which is published by the American Psychiatric Association and is the main diagnostic reference used by mental health professionals in the United States.
Mental illnesses are actual nervous system disorders characterized by issues with thinking, mood, or social interactions. Major conditions such as schizophrenia, major depression, bipolar disorder, anxiety disorders, and others have specific criteria for diagnosis as outlined in the DSM. Moreover, terms like 'psychological dependence' describe an emotional need to use a substance to alleviate distress, which can be linked to mental health issues. However, 'nervous breakdown' is not featured as a diagnosable condition in any such reference.