Question

in 1917, the russian overthrew the tsar and contributed to russias exit from the war. revolution revival renaissance renegade

Explanation:

The 1917 Russian Revolution overthrew the tsarist regime and led to Russia's withdrawal from World War I. "Revival" means renewal, "Renaissance" refers to a historical cultural movement, and "Renegade" means a traitor—none fit the context of overthrowing a ruler and exiting a war.

Answer:

Revolution