Answer:
External/ internal migration.
Its a strait (B) All the other answers aren't logical
<span>B. agricultural production. :)</span>
<h2>
Russia has the lowest population density in Eastern Europe.</h2><h2 />
Explanation:
Russia is the country with negative growth rate. The estimated population of 2020, is 145.93 million. At present, it ranks the 9th populated country. The largest city in Russia is Moscow with a population of 12.1 million people.
Due to the harsh climate, Russia is the most sparsely populated countries throughout the world. Russia is an urban country as 74% of Russians live either in towns or in cities.
Recently, the population has increased rapidly as people shifted from the remote areas to cities for better opportunities.
