Final answer:
Mirrors are not typically used for client positioning during a waxing service, while bolsters, pillows, and sheets are helpful tools for client comfort and protection.
Step-by-step explanation:
All of the options listed—bolsters (a), pillows (b), mirrors (c), and sheets (d)—can be useful tools to aid in client positioning for waxing services. Bolsters and pillows provide support and comfort to clients by helping them maintain the desired position during the waxing procedure. Mirrors are valuable for both clients and estheticians to ensure accurate waxing and grooming Sheets, while essential for maintaining hygiene and cleanliness in the treatment area, may not directly aid in client positioning. However, they play a crucial role in creating a sanitary environment and ensuring the client's modesty and comfort. In summary, all the mentioned tools contribute to a positive waxing experience by facilitating proper positioning, comfort, hygiene, and accuracy during the service.