Final answer:
The most helpful assessment initially in identifying an at-risk newborn is the newborn's Apgar score. It assesses the newborn's skin color, heart rate, reflex, muscle tone, and respiration, and provides valuable information about the baby's wellbeing and whether immediate medical attention is needed.
Step-by-step explanation:
The most helpful assessment initially in identifying an at-risk newborn is the newborn's Apgar score. The Apgar score is a quick and easy test that evaluates a newborn's transition from the uterus to the outside world. It assesses the newborn's skin color, heart rate, reflex, muscle tone, and respiration, and provides valuable information about the baby's wellbeing and whether immediate medical attention is needed.