A nurse is caring for a preterm newborn who is in an incubator to maintain a neutral thermal environment. The father of the newborn asks the nurse why this is necessary. Which of the following responses should the nurse make.

"Preterm newborns have a smaller body surface area than normal newborns.”.

"The added brown fat layer in a preterm newborn reduces his ability to generate heat.”.

"Preterm newborns lack adequate temperature control mechanisms.”.

"The heat in the incubator rapidly dries the sweat of preterm newborns.”. —