What were the main reasons the Russian revolution took place

Economically, widespread inflation and food shortages in Russia contributed to the revolution. Militarily, inadequate supplies, logistics, and weaponry led to heavy losses that the Russians suffered during World War I; this further weakened Russia's view of Nicholas II. They viewed him as weak and unfit to rule.

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity