Final answer:
OSHA covers every employer engaged in commerce with 10 or more employees, requiring them to follow safety standards and maintain hazard-free work environments.
Step-by-step explanation:
Every employer engaged in commerce, except for certain high-risk industries and agriculture, with 10 or more employees is covered by OSHA (Occupational Safety and Health Administration). The scope of OSHA's coverage is broad, encapsulating a wide range of industries and workers. Employers are required to adhere to OSHA standards, which include providing proper training, safety equipment, and maintaining hazard-free work environments, as well as following the General Duty Clause when specific standards do not apply. In industries subject to OSHA oversight, even employers with a relatively small number of employees must ensure they are compliant with safety regulations to protect their workforce.