The biggest cause was disease spread from the people exploring.
Well, I don't see any options
But the Best answer for this is questions:
People no longer depended only on hunting and trying to gather up food.
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Answer:
In 1830, Congress passed the Indian Removal Act, which allowed the government to remove Native Americans from their tribal land and settle them elsewhere. The main targets were tribes in the Southeast, such as the Cherokee. Resettlement was supposed to be voluntary.
Explanation:
Well, Usually it cost a lot for them to get education... and they are a more traditional based society... so men are more likely to be literate for work as opposed to girls.
Answer: A writeing system, The number 0, and a calender system
Explanation:
The Mayans developed their own writing system known as hieroglyphics. "They developed a written language of hieroglyphs and invented the mathematical concept of zero." according to The Maya: Living Maya Time. It also states that " the Maya developed a complex and accurate calendar system."
I hope this helped!