**Core Concept**
Heat loss in newborns is a significant concern due to their large surface area to body mass ratio and immature thermoregulation mechanisms. Newborns lose heat primarily through convection, radiation, and evaporation.

**Why the Correct Answer is Right**
The correct answer is related to the concept of heat transfer in newborns. Newborns lose maximum heat through convection, which involves the transfer of heat from the body surface to the surrounding air. This occurs when the air surrounding the newborn is cooler than the body surface, causing the heat to be conducted away from the body. In the case of a newborn, convection occurs mainly through the head and trunk, as these areas have a larger surface area exposed to the environment.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because conduction, while a significant method of heat transfer, is not the primary method of heat loss in newborns. Conduction requires direct contact between the body and a cooler surface, which is not the primary mechanism of heat loss in newborns.

**Option B:** This option is incorrect because radiation is a method of heat loss, but it is not the primary method in newborns. Radiation involves the transfer of heat through electromagnetic waves, but it is not as significant as convection in newborns.

**Option C:** This option is incorrect because evaporation is a method of heat loss, but it is not the primary method in newborns. Evaporation occurs when sweat evaporates from the skin surface, but newborns do not have a significant amount of sweat glands, making this method less significant.

**Clinical Pearl / High-Yield Fact**
Newborns lose heat rapidly due to their large surface area to body mass ratio and immature thermoregulation mechanisms. It is essential to maintain a warm environment and use techniques such as skin-to-skin contact and wrapping to minimize heat loss.

**Correct Answer: C. Evaporation.**