What was the main reason the Russian empire fell, what caused the empire to weaken

Answer - As Russia became engulfed in World War I, over fifteen million men joined the army, which left a shortage of workers for the factories and farms. This led to widespread shortages of food and materials. As goods became more and more scarce, prices went through the roof, and soon famine consumed Russian cities.

As Russia became surrounded in World War I, over fifteen million men joined the army, which left a shortage of workers for the factories and farms. This led to (existing all over a large area) shortages of food and materials. As products (that are bought and sold) became more and more rare/not enough, prices went through the roof, and soon widespread death from starving used/ate/drank/destroyed Russian cities.