In the context of worksite parties, who is defined as a "worker"?

The definition of a "worker" in the context of worksite parties refers specifically to individuals who are engaged in performing work or tasks related to a particular occupation. This definition emphasizes active participation in work activities, whether through manual labor, skilled trade, or professional services.

In contrast, a person running a business typically refers to an employer or entrepreneur who may have multiple responsibilities, including management and administration, rather than being directly involved in the work itself. Similarly, a person guiding others may indicate someone in a supervisory or mentorship role, which also doesn't align with the direct engagement in work tasks. Lastly, a person providing oversight usually implies a managerial position responsible for ensuring that work is conducted according to safety regulations and standards, rather than being a worker actively performing tasks.

Therefore, the choice that best captures the essence of a "worker" is the individual actively engaged in an occupation, which is the core function of this definition.