Which of the following is an appropriate aide to support a rider's foot?

Using rubber bands to hold a rider's foot in the stirrup can be an appropriate aide because they can provide a secure yet flexible support that allows for some movement while still keeping the foot from slipping out. This can help stabilize a rider's foot during a therapeutic riding session, contributing to their comfort and safety. Rubber bands can stretch to accommodate changes in foot positioning and provide a gentle grip, which can be especially useful for riders who may have difficulty maintaining proper foot position independently.

In contrast, using shoelaces or Velcro can pose safety hazards. Shoelaces might become untied or get caught on equipment, increasing the risk of accidents. Velcro could behave similarly, potentially coming loose unexpectedly or creating difficulties for the rider in terms of getting their foot out if necessary. The option that suggests never using additional supplies reflects a standard best practice in therapeutic riding, as instructors focus on safety and the rider's ability to manage their own positioning comfortably, discouraging the use of makeshift or non-standard aids that could compromise overall safety and effectiveness.