Migration, trade, conquest, and pursuit of religious freedom.
Answer:
The European presence in America spurred countless changes in the environment, setting into motion chains of events that affected native animals as well as people. ... With their loss came the loss of beaver ponds, which had served as habitats for fish as well as water sources for deer, moose, and other animals.
Explanation:
Yhe answer is the third one hope i could help
There were many reasons. The country was in extreme poverty, there was starvation everywhere and people were dying in misery. They wanted to change the imperialistic rule and impose their own bolshevik rule. People also wanted to end their participation in the war which is one of the first things that happened after the revolution. The communists left the war before the war ended.
