Final answer:
The nurse is teaching new mothers about newborn safety precautions, which include safe sleep practices, car seat safety, hygiene, supervision, and avoiding hazards.
Step-by-step explanation:
When a nurse is reinforcing teaching about newborn safety precautions with a group of new mothers, the primary goal is to provide information on how to keep their newborns safe and healthy. This can include topics such as safe sleep practices, car seat safety, preventing falls, and protecting the infant from illnesses by practicing good hygiene. Teaching about the importance of supervising the baby at all times, being cautious with hot objects, and securing cords and small objects out of the baby's reach are also important.