Psychotropic medications are drugs that target the brain to treat symptoms of mental, emotional, or behavioral disorders. Therefore, the correct option from the provided choices is:
"To treat symptoms of mental, emotional or behavioral disorders."
These medications are not limited to treating only symptoms of emotional or mental disorders but can also be used for behavioral disorders. By affecting neurotransmitter levels in the brain, psychotropic medications can help alleviate symptoms of conditions such as depression, anxiety, bipolar disorder, schizophrenia, ADHD, and others. They play a crucial role in managing these disorders and improving the quality of life for individuals who require such treatment.