Final answer:
The last step in performing a wet hair service inclusive of draping, shampooing, and conditioning is to rinse the hair.
Step-by-step explanation:
The correct answer is b) Rinse hair. When performing a wet hair service inclusive of draping, shampooing, and conditioning, the last step would be to rinse the hair. After shampooing and applying conditioner, it is necessary to rinse the hair with water to remove the product. Once the hair is rinsed, it can then be dried.