The answer is b I took the test already
I believe the answer would be Oceanography.
Answer: A hope it helps uuuu
Explanation:
The Ice Age taught people to migrate.
The Final End of Athenian Democracy. A year after their defeat of Athens in 404 BC, the Spartans allowed the Athenians to replace the government of the Thirty Tyrants with a new democracy. Only a decade later Sparta had been reduced to a shadow of its former self. But Thebes' dominance of Greece would be short-lived.