What specific type of written policy does MA4 require for participant safety?

The correct choice emphasizes the importance of safety equipment in ensuring participant safety during equine-assisted activities. The requirement for a written policy on safety stirrups and footwear is crucial because these elements directly affect the physical safety of participants when engaging with horses. Proper stirrups help prevent accidents such as getting caught in equipment, while appropriate footwear can protect against injuries.

In the context of equine therapy and related activities, ensuring that participants wear the correct gear promotes a safe environment, reducing risks associated with falls or unexpected movements of the horse. This aligns with best practices in therapeutic riding, which prioritize participant safety through well-defined standards regarding appropriate equipment and attire.

The relevance of other options might focus on different aspects of participant safety or operational procedures, but they do not directly address the specific physical safety concerns tied to equipment like stirrups and footwear.