Which statements describe Einsatzgruppen? Check all that apply. They were considered the last step in the "Final Solution."
They were part of the German army.
They carried out mass executions.
They were known as mobilized killing units.
They were used by Germany during the invastons of Poland and the Soviet Union.

They were known as mobilized killing units

Explanation:

The Einsatzgruppen were key perpetrators of the Holocaust, and carried out mass shootings on Hitler's "unwanted" groups such as the Jews, Soviets, and the Roma.

food chain i would say only because there is competition on getting food and survival

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.