The main factor was the utilization of raised field agriculture. They would build these fields that had been artificially raised to a certain height along a flowing water source (mostly rivers but occasionally streams as well in some cases). When tropical weather patterns would cause said water sources to flood, instead of washing away the crops, it would act as irrigation for the raised fields. Securing a steady food source allowed the Mayans to support a large civilization in the tropical regions they called home.
There have been a lot of historical events that are important to American citizens. One thing you could write about is suffrage, the right gained for women to vote. Obviously, that is important to American citizens because now women are allowed to vote.
He learned of African gold when he served as a soldier.
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Explanation: Image result for who is john smith and why is he important
John Smith was an English explorer, soldier and writer best known for his role in establishing the first permanent English colony in the New World at Jamestown, Virginia. Smith's legend has grown over the centuries, in particular due to the popular story of his involvement with Pocahontas, a native American princess
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Lol niether
Explanation:
They dont seem like they work out but maybe trump could make a wall to protect himself -
Sleepy~