What were tools such as sharpened stone tools and spear throwers used for?

They were primarily used as weapons for hunting, spear fishing, and self defense from both animals and humans when needed.

the answer is title i subtitle b

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.