Final answer:
The act of lightly pushing on a client's shoulders when they are balancing on one foot to assist them in maintaining or recovering balance is called assisting.
Step-by-step explanation:
The term that describes the act of lightly pushing on a client's shoulders when they are balancing on one foot to help them maintain or recover balance is assisting. This technique is used to simulate natural, everyday disturbances in balance that the client might experience, helping them to improve their reactions and stability. By providing a gentle push on the shoulders, the clinician or support person helps the client maintain proper posture and stability while balancing on one foot.