The pair of leaders that used political purges including the killing of opposition groups as a means of maintaining control of the government were Joseph Stalin and Mao Zedong. Stalin was the communist leader in Russia and Mao Zedong was another communist leader from the country of china. I hope it helps you.
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Answer:
a whistle blower. A whistle blower is a person who informs on a person or organization engaged in an illicit activity. which is the definition you have described.
Some animals mistake plastic for food, some choke, and even suffocate to death.
