Bella is extremely depressed most of every day. She experiences drastic changes in appetite, has trouble concentrating, and feels exceptionally tired, but can't seem to sleep. Though she participates in activities, she finds very little to no enjoyment. Bella appears to be experiencing .

The answer is "Abnormal Behavior"

Explanation:

Abnormal Behavior patterns are delegated "Mental Disorder" Mental messes include either enthusiastic pain (regularly melancholy or nervousness), fundamentally hindered working (trouble meeting duties at work, in the family, or then again in the public eye everywhere), or conduct that spots individuals in danger for individual affliction, torment, inability, or demise (e.g., self destruction endeavors, rehashed utilization of unsafe medications).

Let us additionally note that a personal conduct standard that speaks to a normal or socially proper reaction to a distressing occasion, for example, indications of loss or anguish following the passing of a friend or family member, isn't viewed as disorders, regardless of whether conduct is essentially impeded. In the event that an individual's conduct remains fundamentally impeded throughout an all-inclusive time frame, nonetheless, a determination of a psychological issue might get proper.

b. heterotroph

explanation: