Answer:
b. in cold climates
Explanation:
The warm-blooded organisms living in colder climates have short and round bodies with short appendages to reduce the heat exchange with surroundings and thereby, to stay warm. Â
The short and muscular bodies of Neanderthal populations, with short arms and legs, would have a higher surface area to volume ratio. The lesser surface area of their bodies with respect to the volume would have helped them to stay warm in cold climatic conditions. Â