What entity has responsibilities assigned by law for health-related matters?

The Department of Health is the correct answer because it is the principal state agency responsible for public health and wellness in Florida. This agency oversees various health-related matters, including regulatory functions, disease control, health education, and environmental health. As laid out in state laws, the Department of Health is tasked with implementing health policies and programs to protect and improve the health of residents.

In contrast, while the Psychology Board does play a critical role in regulating the practice of psychology and ensuring that practitioners meet necessary qualifications, its scope is more limited to the field of psychology rather than health-related matters across the board. The Licensing Authority is involved in the credentialing process but does not handle broader health issues. The American Psychological Association, though influential in the field of psychology, is a professional organization focused on advocacy, education, and research rather than serving as a regulatory body for health-related matters. Thus, the Department of Health stands out as the dedicated entity assigned by law to handle a wide range of health-related responsibilities.