What caused the Greeks to unify in defense of their culture and way of life? (1 point) the attempt of Athens to force democracy on all the poleis the threat of the Persian Empire conquering Greece the invasion of Corinth by Thermopylae the attempt by Sparta to control all of Greece

The correct answer is **the threat of the Persian Empire conquering Greece**. The invasions of the Persian Empire, particularly under King Xerxes, prompted the Greek city-states to unite temporarily in defense against a common enemy, leading to significant battles such as the Battle of Thermopylae and the Battle of Salamis.