What kind of environments does the WPS aim to protect workers in?

The Worker Protection Standard (WPS) is designed to safeguard agricultural workers in a variety of environments that involve the use of pesticides. The correct choice highlights that the WPS covers farms, forests, nurseries, and greenhouses because these areas often involve regular pesticide applications that can pose risks to workers.

Pesticides are commonly used in these settings, making it essential to have regulations in place to ensure that workers are informed, trained, and protected from potential hazards associated with pesticide exposure. This includes providing specific safety measures, training requirements, and access to important information regarding pesticide use.

The other environments mentioned in the options either do not align with the primary focus of the WPS or fall outside the agricultural context that the WPS aims to protect. Therefore, recognizing that the WPS is applicable to a broader range of agricultural contexts is fundamental in understanding its scope and purpose.