Final Answer:
Movement at the ankle that brings the foot closer to the shin (rocking back on one's heels) is B. Dorsiflexion.
Step-by-step explanation:
Dorsiflexion is the movement at the ankle that brings the foot closer to the shin, akin to rocking back on one's heels. This action involves the contraction of the muscles at the front of the leg, particularly the tibialis anterior and extensor muscles, allowing the foot to move upward towards the shin.
When you dorsiflex your foot, the angle between your foot and shin decreases, bringing the top of the foot towards the front of the leg. This movement is crucial for various activities like walking, running, and maintaining balance, as it enables the foot to clear the ground during the swing phase of walking and helps in lifting the foot to prevent tripping.
Dorsiflexion is essential for proper gait and is utilized in activities that involve lifting the foot and preparing for ground contact. It's a pivotal movement in ensuring stability and adaptability in various physical motions, from simple walking to complex athletic maneuvers.
Therefore, option B is the right answer.