Final answer:
Skin rolling is the form of friction massage performed by grasping the client's skin several inches apart and twisting in opposite directions.
Step-by-step explanation:
The form of friction massage performed by grasping the client's skin several inches apart and twisting in opposite directions is skin rolling. Skin rolling is a technique used in massage therapy that helps to mobilize the skin and underlying tissues. It involves picking up a fold of skin and subcutaneous tissue and then rolling it gently between the fingers and thumbs or between the palms of the hands.