Final answer:
When weight goes on the stance foot, adduction occurs, which means the bone moves toward the midline of the body to help stabilize and balance the weight.
Step-by-step explanation:
As weight goes on the stance foot, the movement that occurs is known as adduction. Adduction is the movement of a bone toward the midline of the body. For example, when standing on one leg, the hip of the stance leg performs adduction by moving closer to the midline to support the body's weight. This action helps to stabilize the pelvis and maintain balance. Abduction, on the other hand, is moving a bone away from the midline, which is not the case when weight-bearing on a single foot.