Why do the facial features in central asia's population vary widely throughout the region? a. over many years, immigrants searching for better opportunities have flooded the region of central asia./ b. central asians all belong to the same ethnic group but have developed distinctly different physical features./ c. central asia served as a crossroads for centuries and has been heavily influenced by mongol and russian rule./d. a dramatically changing climate has caused different physical features to emerge in the people of central asia.

The correct answer is C) Central Asia served as a crossroads for centuries and has been heavily influenced by Mongol and Russian rule.

The reason the facial features in Central Asia’s population vary widely throughout the region is that Central Asia served as a crossroads for centuries and has been heavily influenced by Mongol and Russian rule.

Central Asia people have many facial features because they are the result of many genetics influences. Being in the special location they are, Central Asia people have been inhabited by people from other races of the region that have lived there for different reasons such as trade and invasions. They have Caucasoid, Mongol and Russian influences.  

i think its the outcome of people's preferences.