The sensory system that is least mature at the time of birth is:
1. vision.
2. hearing.
3. smell.
4. taste.
1
1. Correct. The visual system continues to develop for the first 6 months.
2. Incorrect. As soon as the amniotic fluid drains from the ear (minutes), the infant's hearing is similar to that of an adult.
3. Incorrect. Newborns have a highly developed sense of smell.
4. Incorrect. The newborn can distinguish and reacts to various tastes.
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