What Causes the Existence of Superficial Differences Among Groups of Humans

Question

What causes the existence of superficial differences among groups of humans?
A) temporal isolation
B) geographic isolation
C) genetic incompatibility
D) behavioral isolation

Accepted Answer

Geographic isolation, or physical separation of populations, can lead to genetic drift and adaptation to different environmental conditions, eventually resulting in the development of superficial differences among human groups, such as skin color or facial features. Temporal isolation, genetic incompatibility, and behavioral isolation are not directly related to the development of superficial differences.