Final answer:
The movement where one foot is stationary and the body turns, known as a pivot turn, is a rotational movement used in sports for quick direction changes.OPTION A.
Step-by-step explanation:
The movement described in the student's question, where the body turns by moving one foot while keeping the other foot stationary, is known as a pivot turn. Once the pivot foot is established, it cannot be changed throughout the movement. This type of movement is often seen in various sports like basketball or soccer, where quick changes of direction are necessary, and it relies on the rotational capacity of the pivot joint. Examples of similar rotational movements include the rotation of the head from side to side or the rotation of the radius and ulna enabling the palm to face up or down.
In this scenario, the movement described is called pivot turn. A pivot turn involves turning the body and moving one foot while keeping the other foot stationary. Once the pivot foot is established, it cannot be changed. An example of a pivot turn is when a basketball player pivots on one foot while holding the ball and looking for an open teammate to pass to.