Final answer:
Hallucinations and delusions are key symptoms of schizophrenia.
Step-by-step explanation:
The key symptoms of hallucinations and delusions are associated with schizophrenia. Schizophrenia is a mental disorder characterized by abnormal perceptions and beliefs that are not based in reality. Hallucinations are sensory experiences that occur without external stimulation, while delusions are fixed false beliefs that are resistant to evidence or reasoning.
Learn more about Schizophrenia