Final Answer:
Eversion involves outward movement, while retraction involves pulling inward toward the midline.
Options a and b are not opposites, as they represent different types of movements not aligned with eversion.Thus option c is the correct option.
Step-by-step explanation:
Eversion and retraction are terms used to describe movements in anatomy. Eversion refers to the outward turning or movement of a structure, while retraction involves pulling a structure back inward. Therefore, the correct answer to the question is retraction (option c).
In anatomical terms, eversion typically involves movements away from the midline or turning outward, as seen in the eversion of the foot. On the other hand, retraction involves movements toward the midline or pulling inward. To visualize this, consider the example of the foot: when the foot everts, the sole turns outward, and when it retracts, the sole turns inward.
Option a (protraction) and option b (depression) are not the opposites of eversion. Protraction usually refers to moving a body part forward or away from the midline, not necessarily involving turning outward. Depression usually refers to downward movement, which is not opposite to the lateral movement associated with eversion.
In summary, retraction is the opposite of eversion in anatomical terms, as it involves movements toward the midline or pulling inward, contrasting with the outward turning or movement associated with eversion.
Therefore option c is the correct option.