Derek is suffering from a severe mental illness that is characterized by distorted thought and perception. he hears voices in his head and is convinced that aliens are trying to communicate with him. derek’s belief is so strong that he sits on the roof for hours having conversations with no one in particular. derek is also in the habit of writing words that make no sense and refrains from interacting with other people. in the context of dissociative disorders, it can be inferred that derek is most likely suffering from in this scenario.

schizophrenia

Explanation:

Schizophrenia is a chronic and serious mental disorder that affects the way a person thinks, feels and behaves. It causes changes in behavior, affective indifference, confused thoughts and difficulties in relating to people. People with schizophrenia may seem to have lost touch with reality. Although schizophrenia is not as common as other mental disorders, the symptoms can be very disabling.

It is common for people with this disorder to have distorted thoughts and perceptions, to hear voices, to have unrealistic thoughts, and to see things that do not exist. Derek shows many of these signs, which may indicate that he has schizophrenia.

the answer is a