Answer:d. the defeat of the Persians in 480 BCE.
Explanation:The Early Classical period, also called the Period of Transition, lasted from c. 480-450 BCE. [1] It was the transitional period between the Archaic period and the High Classical period. Throughout the Classical period, the Greeks were interested in humanism, rationalism, and idealism.
Battle of Thermopylae, (480 bce), battle in central Greece at the mountain pass of Thermopylae during the Persian Wars. The Greek forces, mostly Spartan, were led by Leonidas. ... Sending the main army in retreat, Leonidas and a small contingent remained behind to resist the advance and were defeated.
It upset the balance of free and slave states in the US.
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The steam engine as it was to be used in many machines such as trains, steamboats, factories, farming equipments, etc.
