Psychiatric social worker are the mental health professionals that provide the treatment, counseling, and therapy to those persons who are mentally ill. They also help the family member of the mentally ill person to learn how to deal with the mental problem of the patient.
Psychiatric social worker makes care plans for mentally ill patients separately. This plan may contain special treatment, therapy, and counseling of patient but they can not advise medication. So the right answer is a psychiatric social worker.
The human hair color is controlled by more than one gene. In this case, hair color is a polygenic trait, which exhibits polygenic inheritance. There are individuals who inherit different combinations of alleles that are responsible for hair colors.