Under which law is the sale of many noxious weeds prohibited in Washington state?

The sale of many noxious weeds is prohibited under the Quarantine Law, RCW 17.24, in Washington state. This law establishes regulations to prevent the introduction and spread of specific plant pests and diseases. By identifying certain weeds as noxious, the law aims to protect agricultural interests, natural ecosystems, and public health from the detrimental impacts that these invasive species can cause. Enforcement of this law helps to control and manage the spread of noxious weeds, ensuring that affected species do not compromise local agriculture or natural habitats.

The other options address different aspects of agricultural regulation but do not specifically target the sale or management of noxious weeds. The Seed Law focuses on seed quality and labeling, while the Restriction for Groundwater relates to pesticide usage and its impact on groundwater quality. The Herb Sale and Use Regulations primarily govern the sale and application of herbicides rather than the prohibition of specific plant species. Thus, B is the correct choice as it directly addresses the prohibition of the sale of noxious weeds under Washington state's agricultural laws.