I want to know the answer to the following question:
What are probably the primary forces of nature which shaped human races?
All the background I'm provided with is that "This is not surprising since the selective forces of climate are probably the primary forces of nature that have shaped human races with regard not only to skin color and hair form but also the underlying bony structures of the nose, cheekbones, etc.". Is that enough to answer the question?
Answer: yes