In the analogy Glove : Hand, a glove is typically worn on a hand. This relationship is one of clothing to the body part it is worn on. Similarly, we need to find what a sock is worn on, to complete the analogy Sock : ?.
- Shoe: A shoe is worn on the foot, not directly related to where a sock is worn.
- Foot: A sock is worn on a foot, establishing the same relationship as glove to hand.
- Head: Not related, as a sock is not worn on the head.
- Leg: While related to the lower body, a sock is specifically worn on the foot.
Therefore, the correct answer is Foot, as a sock is worn on a foot, maintaining the same relationship as a glove to a hand.