Which of the following areas does police power cover?

Police power refers to the inherent authority of a government to impose restrictions and regulations on private individuals for the purpose of protecting public health, safety, morals, and general welfare. This includes a broad range of regulatory functions that aim to maintain order and safeguard the well-being of the community.

The licensing of professionals is a clear example of police power since it involves establishing qualifications and standards to ensure that individuals engaging in specific professions are competent and do not endanger public welfare. Similarly, enforcing building and fire codes ensures that structures are safe for occupancy, which directly contributes to public health and safety.

In contrast, import/export regulations are more related to trade laws and international commerce, labor relations primarily involve the regulation of employer/employee relationships and are typically governed by labor law, and foreign policy pertains to a nation's strategies in dealing with other countries, which falls outside the scope of police power as it does not directly pertain to the regulation of domestic affairs for public welfare.

Thus, the correct answer appropriately reflects an area where police power is actively exercised to regulate and ensure the safety and welfare of the public.