Answer:
Avolition
Step-by-step explanation:
Schizophrenia is a serious mental disorder which is related to the difficulty in the interpretation of reality.
The person affected with this mental condition shows delusions, hallucinations, inability to interpret the situations, emotions, faulty perception etc.
In the given question, the person is not interested in performing any activity and spends most of her time staring out of the window. This condition in the affected person is a negative symptom of schizophrenia called avolition.
Avolition refers to a condition in which a person loses their motivation to perform any activity and purposeful behaviours.
Thus, avolition is the correct answer.