Final answer:
The upper threshold for low birthweight is a birth weight lower than 2.5 kg (5.5 lb). Thus, the correct answer is A) 5.4 pounds, which is just below the defined threshold.
Step-by-step explanation:
The upper threshold for low birth weight is defined as a birth weight lower than 2.5 kg (5.5 lb). Considering the options provided, the correct answer is A) 5.4 pounds because it is the closest option below the threshold value of 5.5 pounds. Having a weight below this threshold places the infant in the low birthweight category, which is linked to various health challenges and developmental concerns.
Low birth weight is a significant indicator of maternal and infant health. It is often the result of pre-term birth or intrauterine growth restriction, which may occur due to factors such as maternal undernutrition. Babies with low birthweight are at an increased risk for health complications and developmental delays, which makes it important to monitor and support both the mother and infant's health before and after birth.