What were some of the effects of
the growing population in Russia?

Starvation/Famine

Explanation:

As the population boomed in Russia in the late 1800s and early 1900s, the serfdom found itself unable to feed itself, the nobility, and the clergy, as a result the Russian people started the Red October, which eventually saw the fall of the Russian Empire and the Rise of the USSR.

i think the answer is a and i hope this ; ))

when he becomes king