Which sense is least developed at birth?

The sense that is least developed at birth is seeing. Newborns have very limited vision; they can see only about 8 to 12 inches away, which is approximately the distance to a caregiver’s face during feeding. Their visual acuity is poor, as they have not yet developed the ability to focus on objects beyond that short distance or to perceive colors clearly.

In contrast, hearing is relatively well developed at birth; babies can detect sounds and even recognize their mother's voice shortly after birth. Taste also develops early, as newborns can respond to different flavors, showing preferences for sweet tastes. Touch is a well-established sense at birth, as infants respond to tactile stimuli, which is crucial for bonding and emotional development.

Thus, seeing is the correct choice because it is indeed the least developed sense during the early stages of a newborn's life.