The correct answer is “religion.”
The purpose of mythology in “The Metamorphosis of the Dnieper, the Volga and the Dvina” is religion.
All three characters used to be normal people. They were part of a common family. Dnieper was the brother and Volga and Dvina were his sisters. They had no parents and they lived in orphans. To make a living they had to work very hard until exhaustion. They did not have a proper childhood due to the daily work they did to survive. One day they decided to escape and slept in a swamp. The sisters disappeared and he chased them through the valleys and Woods. The purpose of mythology in “The Metamorphosis of the Dnieper, the Volga and the Dvina” is religion.
