When the Conquistadors arrived in South America and began their take over, many Native American died. What was the main
cause of death for so many Natives?

Disease

Explanation:

When conquistadors came to the America's they brought with them Diseases that were completely foreign to them, and there body causing mass death from Disease.

the first forms of writing came from them in the form of pictographs around 3100 bc.

a because i tried to vote with just my college id and the answer was no