Final answer:
One of the known risk factors of SIDS is putting a baby to sleep on his or her back. However, mother smoking during pregnancy, mother younger than 20 years, and low birth weight are all known risk factors of SIDS.
Step-by-step explanation:
One of the known risk factors of SIDS is putting a baby to sleep on his or her back. This practice is actually recommended as it helps reduce the risk of SIDS. However, mother smoking during pregnancy, mother younger than 20 years, and low birth weight are all known risk factors of SIDS. These factors have been associated with an increased risk of SIDS in infants.