The Bedouins of Saudi Arabia live in tents, wear robes, and lead a nomadic life; the Yakuts of Eastern Siberia live in wooden huts, wear fur clothing, and have means of transportation

Test Question Analysis: Arabs mainly live in West Asia and North Africa, due to the formation of a hot and dry tropical desert climate in West Asia and North Africa, the Arabs mostly like to wear white robes, the white color can reflect the Stronger sun rays, robes can block the strong wind and sand, living in tents, is to adapt to the nomadic life by water and grass; East Siberia is located in the high latitude, the climate is very cold, the local Yakutia, living in wooden houses, dressed in fur clothing, the means of transportation is a dog sled. From this, we can see that people's habits are mainly affected by climatic factors, so choose B.