The Greeks defeated the most powerful empire of the day, Persia
I think the French surrender of Montreal was most significant for Britain as for future America it was, the Battle of Monongahela River when Washington had his first experience with true battle and lost his mentor Braddock.
Products changed from hand-made goods to machine-made goods. As it was the beginning of the now defined: industry.
Answer:
the atmosphere and ocean once had no oxygen
Explanation: