Good Morning!
Russia in 2015 has a positive demographic growth rate of just over 0.5%, or not as high as countries like Canada or Brazil, which turn around 1% (more or less).
In the year 2016, however, the rates were negative, with a decrease in the number of births and an increase in the number of deaths.
So the correct answer is:
The population is increasing due to high birthrates and low death rates.