After the persian war, what did sparta, athens, and other greek communities collect to ward off future external attacks?

a slaves
b corn and other grains
c money
d resources for building walls

The correct answer is C) money.

After the Persian War, Sparta, Athens, and other Greek communities collected money to ward off future external attacks.

We are talking about ancient Greek times, approximately in the 5th century BC. Persian King Darius commanded one of the most powerful armies of the time but was defeated by the Athenians in the Battle of Marathon in 490 BC. Then, it was Darius' son, who tried to capture Athens but also was defeated. To prevent other invasions, Sparta, Athens, and other Greek communities collected money to ward off future external attacks.

i would think it's industries and hydroelectric power

donald carl johanson (born june 28, 1943) is an american paleoanthropologist. he is known for discovering – with yves coppens and maurice taieb – the fossil of a female hominin australopithecine known as "lucy" in the afar triangle region of hadar, ethiopia.

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sorry if this is incorrect.