Final answer:
Theories of mental disorders should explain and predict symptoms, causes, and treatments, while guiding classification and diagnosis.
Step-by-step explanation:
Theories of mental disorders should be able to explain and predict the symptoms, causes, and potential treatments of these disorders. They should provide insights into the underlying mechanisms and factors that contribute to the development of mental disorders. For example, biochemical theories of mental disorders focus on the role of neurotransmitters in conditions like depression, anxiety, bipolar disorder, and schizophrenia. Genetic theories explore the influence of genetic factors on the development of these disorders. Additionally, theories should help guide the classification and diagnosis of mental disorders, as well as inform effective and appropriate treatments.