What area must the ABW be trained in?

The area where the Associate Barn Worker (ABW) must be trained is in using the second set of reins and assisting the participant. This training is essential as it ensures that the ABW is equipped to provide the necessary support for participants during therapeutic riding sessions.

Using the second set of reins is a critical skill that allows the ABW to help manage the horse effectively, ensuring the safety and comfort of the rider. Additionally, assisting the participant involves understanding how to provide physical support and verbal encouragement, which are crucial components of the therapeutic riding experience. Proper training in these areas prepares the ABW to respond to various situations, promoting a safe and supportive environment for riders.

The other options do not encompass the comprehensive training required for effective support in therapeutic settings, which highlights the importance of specialized training focused on both the horse and rider interaction.