What is the purpose of posting warning signs during fumigation?

The purpose of posting warning signs during fumigation is to inform the public of potential hazards associated with the fumigation process. These signs serve as a critical safety measure, alerting individuals to the presence of toxic gases and the risks they pose to humans, pets, and the environment. This precaution helps ensure that people are aware of the ongoing treatment and can take necessary measures to avoid exposure.

The other options do not fulfill the primary responsibility of warning signs in this context. Adding aesthetic elements or advertising a service does not align with the necessary public safety function that the signs provide. While marking property boundaries may share some relevance to operational procedures, it does not convey the essential information about safety hazards that is crucial during fumigation activities.