Final answer:
The correct option is 3) Abduction. The term for the movement of a body part anterior to the coronal plane is flexion, which involves a decrease in the angle between body parts.
Step-by-step explanation:
The movement of a body part anterior to the coronal plane is referred to as flexion. This type of movement is evident when the angle between body parts decreases. An example of flexion is when you bend your elbow to bring your hand closer to your shoulder.
In contrast, extension is the opposite action, where the angle increases as you straighten the joint. Abduction and adduction refer to movements that are in the coronal plane, which involve taking limbs away or towards the midline of the body, respectively. Hence, flexion aligns with the definition of moving a body part anteriorly in the context of this question.