Answer:
Bipolar disorder
Step-by-step explanation:
In psychopathology, a bipolar disorder is a mental disorder that causes swings of mood in energy and concentration. For example, the person can experience outbursts of depression (wanting to sleep all day, not wanting to carry on with their usual activities) and then become extremely euphoric or happy for no apparent reason. In order to be diagnosed, this disorder has to be present for a specific period of time. However, these are the main symptoms.
In this example, Jeremy has extreme, recurring mood swings in which he experiences severe bouts of depression and then becomes extremely agitated and euphoric for no apparent reason. We can see that he is recuringly experiencing bouts of depression and then euphoric episodes for no reason. We can conclude that he is most probably suffering from Bipolar disorder.