Solution:The Inuit populations, adapted to cold Arctic environments, exhibit specific physiological characteristics distinct from tropical dwellers. One such characteristic is increased metabolic heat production (b), which helps maintain body heat in extremely cold conditions.The Inuit also show greater transfer of heat to the extremities (c) to prevent frostbite, crucial for survival in Arctic climates. This contrasts with tropical dwellers who are adapted to release heat from the body to cope with warmer temperatures.
The option suggesting greater surface area to body mass (d) is incorrect for Inuit populations, as their body proportions typically include a lower surface area to body mass ratio to minimize heat loss. Similarly, ectomorphic somatotype (a) characterizes a lean and tall physique, more common in warmer climates to dissipate heat, which is not typical among Inuit.