The correct answer highlights the establishment of the Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH) as a direct result of the Occupational Safety and Health Act of 1970.
OSHA was created to set and enforce workplace safety and health regulations, ensuring that employers provide a safe environment for their employees. This is crucial in industries such as tree care, where there are specific hazards that workers face.
NIOSH, on the other hand, was established to conduct research and make recommendations for the prevention of work-related injuries and illnesses. It supports the overall mission of OSHA by providing scientific evidence and guidance to improve workplace safety practices.
These two organizations play complementary roles in safeguarding worker health and safety, making their creation pivotal under the 1970 Act. The other choices do not correctly pair the entities formed specifically as a result of this Act.