Carol finds she is no longer interested in things she used to do, is sad most of the time, and thinks she is a terrible person. additionally, she has recently lost a lot of weight and doesn't sleep very much. carol's behavior would be diagnosed as

Carol finds she is no longer interested in things she used to do, is sad most of the time, and thinks she is a terrrible person. Addiotionally, she has recently lost a lot of weight and doesn't sleep very much. Carol's behavior would be diagnosed as experiencing a "mood disorder".

Explanation:

Mood disorders are conditions in which mental health is disturbed by not experiencing a regular mood cycle and state. They are considered diseases and psychologic disorders under DSM-V which marks the most objective classification of psychological conditions. Furthermore, Mood disorders are spotted when a subject's life is affected emotionally, behaviorally and socially. They require psychological treatment as soon as possible because even though they are not dangerous they are the first step of a dangerous disorder.

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there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.