Answer:
Big cities, convenience.
Explanation:
In the most densely populated areas of Europe and Russia, there are cities which means that things will be close to people. Cities provide convenient for people, they are more populated.
The answer is Islam spread.
Families of characteristics, age
Answer:1 Russian
2. Tsar Nicholas
3.Ottomans
4. Armenians
5. T. E. Lawrence
6. Germans
7. u-boats.
8. aeroplanes
9.
