Final answer:
The term that describes moving a part backward, such as pulling the head backward, is retraction (Option A). It refers to the movement of the scapula or mandible posteriorly towards the spinal column.
Step-by-step explanation:
The term for moving a part backward, like pulling the head backward, is retraction.
This movement of the scapula or mandible involves pulling posteriorly towards the vertebral column.
It's the opposite of protraction, where the scapula or mandible is moved forward.
When discussing the movement of the leg away from the body, the term used is abductor, as it moves a limb laterally away from the midline of the body.
Hence, the correct answer is: Retraction (Option A).