Emma's team won the state championship. when she returned to school, however, she seemed bored, sad, and seemed to have no enthusiasm for her school work. two days later, emma was back to her usual cheerful self. emma's "blues" would most likely be considered

Depression

Explanation:

Depression in psychology or health terms, is defined as a mood disorder, which often times associated with sadness, loss, boredom and lack of enthusiasm towards things of interest. It can as well last for few days before the patient or individual involved to get back to normal.

Depression can be caused as a result of complex relationships of social, psychological and biological factors, notably, people who have gone through a lot of difficulties in life.

Basically divided into two:

1. Recurrent depressive disorder

2. Biopolar affective disorder

Therefore, in this case, Emma is exhibiting characteristics associated with Depression.