What do Russia, the Caucasus, and Central Asia have in common? All people in all areas only practice Islam. Russian is the most common language. many different ethnic groups live in each area. They all live in mountain areas.

While it is true that Islam is practiced by a significant portion of the population in Russia, the Caucasus, and Central Asia, there are important differences among these regions.

1. Religion: While Islam is a significant religion in the Caucasus and Central Asia, Russia has a diverse religious landscape, including various Christian denominations, Buddhism, Judaism, and others.

2. Language: While Russian is commonly spoken in Russia, it is not the most common language in the Caucasus and Central Asia. In these regions, languages such as Azerbaijani, Armenian, Georgian, Kazakh, Uzbek, Kyrgyz, and Tajik are commonly spoken.

3. Ethnic Diversity: The Caucasus and Central Asia are known for their ethnic diversity, with numerous different ethnic groups living in each area. Russia is also ethnically diverse, with a wide range of ethnic groups, but to a lesser extent than the Caucasus and Central Asia.

4. Geography: While there are mountainous areas in Russia, the Caucasus, and Central Asia, not all people in these regions exclusively live in mountain areas. They have a mixture of landscapes, including plains, deserts, steppes, and coastal areas.

Overall, the commonalities among these regions lie in their historical and cultural connections due to historical influences from the Mongol Empire, Islamic architecture, and trade routes. However, it is important to recognize the distinctions within each region.