Eastern Europe has the economic advantage of being located next to the biggest and developed country that is Russia because of their trading agreements. Since 1991 the European Union (EU) and Russia trade materials through the Partnership and Cooperation Agreement. The main exports that EU send to Russia are machinery, manufactured materials, transport equipment, chemicals and medicines
Most parts of Russia : Are far from bodies of water.
Most of its region is continental.
This often cause major crisis in finding enough clean water to fulfill the people's needs.
Collitions between gas particles in the earths atmosphere.
Hope this helps! :D
Sri Lanka ..I'm not sure about the answer cuz India is also a country which has more population of both hindus and muslims.
Please dont judge me if i am wrong. :D